##. ...#..### . 
    #.....###...###x
   #.# ..#.##.x # #.
    ..#..##.. ..#...
   #. #...# #. ...  
 .#..##..##   ..  .#
 ..##..#X##  ### #. 
 # ...#...#    ..  #
. .#.....##   #  .# 
..........### 4.#.  
  ......#X#..#  .#  
. .##.#..#.#   .##  
# #  ∩#.#.4## ...   
    #.#..#..#..#    
      ##...#..#     
      #.#w...#.#    
     ...#wX..# .#   
   ..#.#.#..##  .   
   .  ##..##.    .  
       .:#  .#      
      ##.   ..      
            #.#     
             #.