#   
                           .#   
                           .    
                 .#   ### .##   
                ....###.##..    
               ...##..#.#.#     
               ......#...####   
           ..  ##. ..#......#   
            .......  #.#.#..#   
             .#. .....#....##   
              d   ##..###2.##   
    # ##     ##.  #.........#   
     . .#  # # .###.#.. .x.##   
     .## #  .#...##X..##....#   
      .#.. #. .#.....#....#.... 
     ##XX.## ##..##..##.#..#...#
      ...#X..X.  .. ..#.#..#....
      .#.#.X#..#.... . #.#.#..##
     ##...######.#.#.#.#..#   . 
    ##.# # .#  ..# ..#.# ##     
   #  . . ..### ##..##≈.        
   .## .# #.. ## #.≈≈  #.       
     #...#..#.#    ≈≈≈          
    . #. #   #                  
     . # ##...                  
     # #.#. #.#                 
       #.# #.#..