..    
                               .##  .
                         #    #..# .#
                         .#   .#.#.  
                   ...    .###....   
                    ..# ∆ #...#.#    
                    #..   #.#...#    
                     #.### #....#    
                   # ##...##3.#.#    
                   #.#...#..###.#    
                   # #......#...#    
                   #...#.....#       
                    .#..##.##... ..  
      .              #.#.### ..#...  
..#   ..   #.#    #### .##    ... #  
     #.. ##      ##..# ##     ..#.   
   ≈  #.#. # #.##. #...##      #. #  
#  ≈.  ≈#.. . #..##... #        ..   
   #     .   .#≈≈..#####     ∆       
   #≈ # #.#.≈.#≈. #.#≈#              
   ....#  ..≈....≈..≈.≈.             
.   #.#.   ..###.≈≈....#             
     ##.## ##. #### ##.#             
 .  # . .##...        .#             
  ... # . . ..#                      
   ..   .# .  #                      
  ## #   #  #.#                      
       ### # ##                      
.     .                              
#    #                               
      #