#.                  
        ..                  
      #. .         ###  ∆ # 
        ..#######  #.#  #.##
       ###...#..####.##.....
        ... #..# #...t..#   
         #.#∩ #. ###.##     
         ##.  ##.#.#..#     
       ###.#..#.#..#.##     
      ##..### .#..#..#      
      #.. # #..#..####      
∆      .##  #....#.#        
      ###  #....#...#       
           #..#.###..## .#  
          #.#### . #....    
          #.    .  ##..#    
          ..   #..._ .##    
            # ..###  .      
           . .#    . #.     
           ..     #.        
           #      ##.       
                     #.     
                      .#