..                .#    
            #..              ...    
             ..             #...    
           ###. ##         #X.#.   .
           #...##.#   ### #.#.. # .#
              #...#####.##..#...#.  
             ##..#. #.#.#..# .#..   
              ....#....#.##  ..#    
             #....#.#####.###.##    
             #  ...##...##.#...#    
       ∆     ##.#.##  #....X##...#  
            ##.##X # #.##...#  #.#  
         ## #.#.###∆##  ####.    .# 
           .....####.#      ..      
          ..##.#. #. #      ##.     
        #..# .#.... .##       ..    
           . . #####..#        ##   
     .. ## ..#...##. .#             
      #  # .#. #.....#              
       ....#.###. ###..#            
        .#.  # ... ## .             
.           . .###....#.            
           .#  # ######.            
          #.#           . #         
 #       ##...            .         
   .        . # ..                  
      #   . _# .#                   
.         ..   ##                   
  .# # #. # .    #                  
  #       .#  #                     
.  #     #                          
#   # #      #                      
             #                      
      # .                           
                                    
  #                                 
               #