#409171 failed

47f3218octaspire

Set optimization, trigger GC, clean up a bit

Owner
~octaspire
Created
4 months ago
Updated
4 months ago
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setup
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[#409171] 2021/01/27 21:14:55 Booting image debian/bullseye (default) on port 22314
[#409171] 2021/01/27 21:14:56 Waiting for guest to settle
[#409171] 2021/01/27 21:15:03 Sending tasks
[#409171] 2021/01/27 21:15:04 Sending build environment
[#409171] 2021/01/27 21:15:04 Installing packages
Warning: Permanently added '[localhost]:22314' (ECDSA) to the list of known hosts.
Get:1 http://deb.debian.org/debian bullseye InRelease [123 kB]
Get:2 http://deb.debian.org/debian bullseye/main amd64 Packages.diff/Index [63.6 kB]
Get:3 http://deb.debian.org/debian bullseye/main Translation-en.diff/Index [63.6 kB]
Get:4 http://deb.debian.org/debian bullseye/main amd64 Packages T-2021-01-27-2003.43-F-2021-01-26-1959.53.pdiff [71.1 kB]
Get:4 http://deb.debian.org/debian bullseye/main amd64 Packages T-2021-01-27-2003.43-F-2021-01-26-1959.53.pdiff [71.1 kB]
Get:5 http://deb.debian.org/debian bullseye/main Translation-en T-2021-01-27-0200.02-F-2021-01-26-1959.53.pdiff [7904 B]
Get:5 http://deb.debian.org/debian bullseye/main Translation-en T-2021-01-27-0200.02-F-2021-01-26-1959.53.pdiff [7904 B]
Fetched 329 kB in 3s (109 kB/s)
Reading package lists...
Warning: Permanently added '[localhost]:22314' (ECDSA) to the list of known hosts.
Reading package lists...
Building dependency tree...
Reading state information...
build-essential is already the newest version (12.9).
curl is already the newest version (7.74.0-1).
Suggested packages:
  sbcl-doc sbcl-source slime
Recommended packages:
  binfmt-support
The following NEW packages will be installed:
  sbcl
0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
Need to get 9157 kB of archives.
After this operation, 47.3 MB of additional disk space will be used.
Get:1 http://deb.debian.org/debian bullseye/main amd64 sbcl amd64 2:2.1.0-1 [9157 kB]
Fetched 9157 kB in 1s (7922 kB/s)
Selecting previously unselected package sbcl.
(Reading database ... 
(Reading database ... 5%
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(Reading database ... 100%
(Reading database ... 24002 files and directories currently installed.)
Preparing to unpack .../sbcl_2%3a2.1.0-1_amd64.deb ...
Unpacking sbcl (2:2.1.0-1) ...
Setting up sbcl (2:2.1.0-1) ...
[#409171] 2021/01/27 21:15:11 Cloning repositories
Cloning into 'crates2'...
+ cd crates2
+ git checkout -q 47f32184b134467a39011d0b3ba0f73c121eb355
+ cd crates2
+ git submodule update --init
[#409171] 2021/01/27 21:15:12 Running task setup
[#409171] 2021/01/27 21:15:15 Running task test
[#409171] 2021/01/27 21:15:29 Build failed.
[#409171] 2021/01/27 21:15:29 The build environment will be kept alive for 10 minutes.
[#409171] 2021/01/27 21:15:29 To log in with SSH and examine it, use the following command:
[#409171] 2021/01/27 21:15:29 
[#409171] 2021/01/27 21:15:29 	ssh -t builds@yui.runners.sr.ht connect 409171
[#409171] 2021/01/27 21:15:29 
[#409171] 2021/01/27 21:15:29 After logging in, the deadline is increased to your remaining build time.
[#409171] 2021/01/27 21:25:29 Deadline elapsed. Terminating build environment.
[#409171] 2021/01/27 21:25:29 Error: Running task on guest: exit status 2
setup
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+ curl -O https://beta.quicklisp.org/quicklisp.lisp
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 57144  100 57144    0     0   338k      0 --:--:-- --:--:-- --:--:--  338k
+ sbcl --load quicklisp.lisp --eval '(quicklisp-quickstart:install)' --eval '(ql-util:without-prompting (ql:add-to-init-file))' --eval '(quit)'
This is SBCL 2.1.0.debian, an implementation of ANSI Common Lisp.
More information about SBCL is available at <http://www.sbcl.org/>.

SBCL is free software, provided as is, with absolutely no warranty.
It is mostly in the public domain; some portions are provided under
BSD-style licenses.  See the CREDITS and COPYING files in the
distribution for more information.

  ==== quicklisp quickstart 2015-01-28 loaded ====

    To continue with installation, evaluate: (quicklisp-quickstart:install)

    For installation options, evaluate: (quicklisp-quickstart:help)

; Fetching #<URL "http://beta.quicklisp.org/client/quicklisp.sexp">
; 0.82KB
==================================================
838 bytes in 0.00 seconds (0.00KB/sec)
; Fetching #<URL "http://beta.quicklisp.org/client/2020-01-04/quicklisp.tar">
; 250.00KB
==================================================
256,000 bytes in 0.02 seconds (10416.67KB/sec)
; Fetching #<URL "http://beta.quicklisp.org/client/2015-09-24/setup.lisp">
; 4.94KB
==================================================
5,054 bytes in 0.00 seconds (0.00KB/sec)
; Fetching #<URL "http://beta.quicklisp.org/asdf/2.26/asdf.lisp">
; 194.07KB
==================================================
198,729 bytes in 0.02 seconds (9703.56KB/sec)
; Fetching #<URL "http://beta.quicklisp.org/dist/quicklisp.txt">
; 0.40KB
==================================================
408 bytes in 0.00 seconds (0.00KB/sec)
Installing dist "quicklisp" version "2021-01-24".
; Fetching #<URL "http://beta.quicklisp.org/dist/quicklisp/2021-01-24/releases.txt">
; 475.73KB
==================================================
487,151 bytes in 0.05 seconds (9148.72KB/sec)
; Fetching #<URL "http://beta.quicklisp.org/dist/quicklisp/2021-01-24/systems.txt">
; 347.76KB
==================================================
356,109 bytes in 0.03 seconds (10867.58KB/sec)

  ==== quicklisp installed ====

    To load a system, use: (ql:quickload "system-name")

    To find systems, use: (ql:system-apropos "term")

    To load Quicklisp every time you start Lisp, use: (ql:add-to-init-file)

    For more information, see http://www.quicklisp.org/beta/

I will append the following lines to #P"/home/build/.sbclrc":

  ;;; The following lines added by ql:add-to-init-file:
  #-quicklisp
  (let ((quicklisp-init (merge-pathnames "quicklisp/setup.lisp"
                                         (user-homedir-pathname))))
    (when (probe-file quicklisp-init)
      (load quicklisp-init)))

+ mkdir -p /home/build/quicklisp/local-projects/
+ mv crates2 /home/build/quicklisp/local-projects/
test


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This is a big file! Only the last 128KiB is shown. Click here to download the full log.

> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 808
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-. .--.                   .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =| |  |                   |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-' `--'                   `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-oo-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
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> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: EAST
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 809
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.       .--.             .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|       |  |             |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'       `--'             `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 810
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.             .--.       .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|             |  |       |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'             `--'       `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 811
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                   .--. .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                   |  | |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                   `--' `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 812
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                   .--. .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                   |  | |o  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                   `--' `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 813
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                   .--. .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                   |  | |o  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                   `--' `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: SOUTH
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 814
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+ .--. +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX| |  | |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+ `--' +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 815
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+ .--. +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX| |  | |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+ `--' +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 816
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-. .--. +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =| |  | |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-' `--' +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 817
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+       .--. +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|       |  | |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+       `--' +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 818
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+       .--. +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|       |  | |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+       `--' +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-oo-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 819
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+       .--. +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit|       |  | |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+       `--' +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-oo-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: WEST
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 820
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+ .--.       +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |exit| |  |       |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+ `--'       +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 15|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 16|                                                                                                                        |
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> 17|                                                                                                                        |
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> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 821
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |EXIT|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
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> 15|                                                                                                                        |
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> |                                                                                                                        |
> 16|                                                                                                                        |
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> |                                                                                                                        |
> 17|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 822
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |EXIT|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 13|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 14|                                                                                                                        |
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> 15|                                                                                                                        |
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> 16|                                                                                                                        |
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> 17|                                                                                                                        |
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> 18|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> 19|                                                                                                                        |
> |                                                                                                                        |
> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
> 
> 0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17    18    19
> +------------------------------------------------------------------------------------------------------------------------+ Level 23
> 0|+----++----++----++----++----++----++----++----++----+                                                                  | Input: 
> ||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                                                                  | #updates: 823
> |+----++----++----++----++----++----++----++----++----+                                                                  |
> 1|+----+                                          +----++----++----++----++----++----++----++----+                        |
> ||XXXX|                                          |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |+----+                                          +----++----++----++----++----++----++----++----+                        |
> 2|+----+                                                                                    +----+                        |
> ||XXXX|                                                                                    |XXXX|                        |
> |+----+                                                                                    +----+                        |
> 3|+----+      .-==-.      .-==-.      .-==-.                        .-==-.      .-==-.      +----+                        |
> ||XXXX|      |=  =|      |=  =|      |=  =|                        |=  =|      |=  =|      |XXXX|                        |
> |+----+      `-==-'      `-==-'      `-==-'                        `-==-'      `-==-'      +----+                        |
> 4|+----+            +----++----+.-==-..-==-..-==-.+----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'+----++----+      +----++----+            +----+                        |
> 5|+----+            +----++----+.-==-..-==-.+----++----++----+      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+      +----++----+            +----+                        |
> 6|+----+            +----++----+.-==-..-==-..-==-..-==-..-==-.      +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||=  =||=  =||=  =|      |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'`-==-'`-==-'`-==-'      +----++----+            +----+                        |
> 7|+----+            +----++----+.-==-..-==-.      +----+            +----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =|      |EXIT|            |XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'      +----+            +----++----+            +----+                        |
> 8|+----+            +----++----+.-==-..-==-.+----++----++----+.-==-.+----++----+            +----+                        |
> ||XXXX|            |XXXX||XXXX||=  =||=  =||XXXX||XXXX||XXXX||=  =||XXXX||XXXX|            |XXXX|                        |
> |+----+            +----++----+`-==-'`-==-'+----++----++----+`-==-'+----++----+            +----+                        |
> 9|+----+      .-==-.                                                                        +----+                        |
> ||XXXX|      |=  =|                                                                        |XXXX|                        |
> |+----+      `-==-'                                                                        +----+                        |
> 10|+----++----+                                                                              +----+                        |
> ||XXXX||XXXX|                                                                              |XXXX|                        |
> |+----++----+                                                                              +----+                        |
> 11|      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> |      |XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX||XXXX|                        |
> |      +----++----++----++----++----++----++----++----++----++----++----++----++----++----++----+                        |
> 12|                                                                                                                        |
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> 19|                                                                                                                        |
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> |                                                                                                                        |
> +------------------------------------------------------------------------------------------------------------------------+
make: *** [Makefile:43: test] Error 1
Build complete: failed 4 months ago (took 34 seconds)