.  
                     .    
       #.      # ##  .#   
        .#             #  
          ## ## .  ..... .
          .#.# .# . .#  # 
        ##.. ...#..#.# #  
        # .#.  ..[.. .    
        # .. #... .. # .  
         #...  ##. ..#.   
     # ##.#### .#.## . .# 
      ..#.#..##.#..  ..## 
       #.#..u..#.#..#  .  
     #  #..###.....#.   # 
     #........#....##.#   
##   #.#u#...##..#...##   
..#  ##.#.. .....###..    
 ... #.#.#..#.#..#  ..#   
  . #.## .. #. ###   .    
   # . ..###.##..         
.  .#.# # .. . .          
.. .##.# ...# ###         
  #.....##.##             
  #  .....##              
  . .# .....#             
≈ .  #.#####∩..           
≈≈≈  ##      #.           
.