.#   ..#      
              ..#...#.     
            ## .#.#..      
            #.##..#..      
             #.#....#      
      . #   ###.#.#.##     
      #..   #........#     
       . .#    ##...#   #  
        ...#   #.#.#Xw....#
          ..####...#.w#....
   #∩     #..#.##...##X# #.
         ###.#...#.. ##X#  
  ##..   ...  #.#.. .# X#  
  # .. #####.##...#.##  .  
   ...##. ....##.##.#    . 
     #..#......##. .#      
#### #.#.#.#.### ##..      
...####. ..##.#     .      
#..#...# # #   #           
. # ..#....  .##           
#....####....#.            
#....#    .. .#            
##.#.#     ...             
#.. . #                    
#....##