...   .#   
                               ..   .    
                               #.#  . ## 
      .                      ##...##.#.  
                              ..#.#.#.   
                            .###.#...#   
             ##             #.......D#   
            #.   ###     ##.#.....#.##   
           # .     ##    #.#. .##.##4#   
          # . # ..#.#     .#.##. #..#.#  
     #     .. #  #   ###### ....##..#.#  
        ..#.#.    #....#..# . #...#.##.. 
         .   # .  .##.###....###......#. 
     #     #  . ...#######........#####.#
        . . .  .#.. #......##.#..##     #
       ..    ..#.# #  #..#.#..#.##       
         . . ...  .#.##...# ..##.        
       .  . ...  . ###.#.#X.##..#.       
   .      .. ..#.. ..# .#.∩.# #.###      
              ..#.#..#... #...##..       
.    .   # #.#) ##.. ...#X...#.##..      
             .  #....#.##.#. # .#.#.     
             .#. #.#.##.#.###   .##      
            .. ##..### .#..              
           #   #. .#   ###X              
            #  #....   .#  .             
                 #..   .. #.             
              ..  .