.    ..  ...
       # .  #  .. . ..v 
       .    . ......# .#
       #.. #.. ......v. 
       .... .  v. .  .. 
         . ...v. .xv... 
       .  #......... v..
       ..##...3. ...... 
       ./..##. .#.#+ ###
        #. .#..##    ##.
          ... .#    ##. 
     . .# ?##..#    #  .
     ....###...##   #  .
      . ...##X. #   #.  
       #.##.§v###   ##. 
  ##    #vX.#.v#     ##.
  #.  ###.# v.##    #   
. ... #.v###.##     #.. 
.. #.##.?.##v#       ...
 #.#........##          
.#..##..v#.##           
#..XX..#.v##            
 ....#.vv.##            
 ... ##....#            
 .. #.?...#.#           
  ...#.#.#..#           
#... .#.###.#           
#.. .. #   ...          
.. ...      #.#         
. .#.        ..         
 .#.#