#.              
     ##.##  .#        
      ...# #.#        
      #..# #.#        
      #..# #.#        
 ######..# #.#        
 #...§..y###.#   #    
 #...##yy.##.###.#    
 #.....y.y.§....#...  
 #...##..y.#..........
 #..# ##.#..##########
 #..   #.##.#         
 ...   ..##.#    ∆    
###.   ####.#         
          #.#         
          #.          
          #.