..    ...#. .        
   ..### .. ##..#.     
   ..# ........ ..     
 .  ..... #.....#      
     #.....(...#       
.  .  #.... ....# # .# 
..##.  #.. #v#....# . #
  . .## ... #...## .#..
      .# ##....#.#....#
     #.#.#...##..#.....
      #.##..#......##..
      # .##.#..§.....#.
        .##...#.#.... #
        .####....#..##.
        ........#.###  
        #.......#.#    
        #.....∩..#.    
        .#.#..v..##.   
        ...#..yxy# .#  
        .. ####..#  .  
             ∆####     
                       
                      ∆