. .                  
           ...  ..#             
          # .. ##.#             
#  ###     . ...#.##  ##.       
#.#...#     .......  #..        
  ..#..      #. .#.#..#   #     
 ###... ######..#   .  ...      
 #.....##......#....    .       
 ...#....##. #.. .. ... .#  ..  
 #.....#X.##.### . ..###.#   ...
 ##.###...## # ##.. . .. #....  
 #..#....#.#.## ####   .. .     
  #.....##.##.    #  # # . . .  
  ##.#...#....#   #.# .# . .    
  ....##.#....#  # ####  ###.  .
 #.##. ###..#.###.     . #. .. .
 ## .#   .#._... . # #  . .     
   ..    #.  ..##    .  ##  #   
  ##.   ...####.# # .# #..      
      # #.# ..... ..#..# # ..   
        .. . .  ..   . ..   .   
      # ..  ## ###   .  ##      
     ..         # .#. #         
                #..#.  .        
                . ... .##       
               .      ∩         
               #  .  #          
               . .#. #.         
               .