#.            
                #.            
                #..           
                 ...          
                  ..##        
                ####..        
                #....W##      
                 #...#.##     
                    #...#     
             ###### ##..#     
        # .  #.#..# #..#.....#
         ..###...  ##.###..##.
      #.  . .. .... ..#  .. . 
       #    . ##..#..#.#  .#..
       ..    ..##...##. . .. .
       .. .##.##.#.#....# ..# 
       # .#...#.##.#.#..# .   
         #.....#  ... ...  .  
       # .#. #.###. .... #    
          ## .. . #.#.#       
 #  #  ### # ##.....#..       
#   . ##. ..###.#.#.....      
     ..     ##.##.   #        
  .  .  #..# ...# ..#         
    #.#.#.. # . .# . #        
   ..##..#.  ##.   ..#        
 # #.. ..## .#    #  #        
  ..#  . .    .   # ..        
 #.   # ∩ .  .                
 .     #      .               
 .       #      .