∆                           
                                     
                              .#     
                                     
          .                 #.       
         ##                .. ## #   
         # #..####        ..... . #  
         #. ...#.#### # ###.# . # .# 
          .#.  .# .#. . #........... 
           .....##  .#. ....#... ..  
    .    ##### .####. #.#.. #..#.##. 
       ..  .#.# #.  # ####.........  
           # .....#  . ##......##.#..
  #    #  .   .# # ##.   ## #.. #..# 
     #  .###.     # #.### .#... .#   
   ## #   .. . .#.  ##....#......#   
         # # ....  #.#.....# ...##   
      .   # . # .# ........##..#..   
..      #.    ##.. ..# # ......# ..# 
        ....# #.#.#.##. #.....##  ## 
        .##   ##.. .###..d.....#     
   #     #   ##...#.....##..####     
                #..###.###....#      
      #         #.#x5.# ..#.....#    
       ..#.     #..#......##....#    
       .  ..  ....##.....#...# #.#   
            ..#... #...##.##.# # ..  
              #.###......## ....  #  
             ... ......##.  .# ##    
            ..###..##.##  #          
            ##  #.. #.# ∆            
                #.  .#