. .#.                
       ....        .       
                ... .      
     .  #. .    ..  .      
.. #.. # #.  ### ..# #    #
. ..#.#..#  #. # .  . # .  
#......#.....###.. #..##.  
#.......#.....#.... . #..  
.......  ..).............  
......§.#.....#.. ....#    
    ...###)....#.....##    
 #..#.#∩##....###.##.      
   #.....#.....#...###     
  #.....#.#.#........#     
 #.#........x....... #.    
 ##.........b....... .#    
  ##.#####.#...##... ##    
   #     ###.#########     
           ###             
                           
                           
             ∆             
                  ∆