...                       
   ...                       
   ∆..                       
    W.                       
    #.                       
   ##.                       
   #..############           
   #.......##....##.         
   #...............          
   ##.....(##....#           
  .##......##....#           
 ................#           
.................#           
............)....#           
..........)##....#           
...........##(W(.#           
.).##......##)...#           
 .. #......##....#           
   .........#....#       ∆   
   .........#....#           
   .........#....#           
   ###...####.##.#######     
         ####.##.##....#     
         ..............#     
         ..............######
         ...................#
         ...................#
         ...................#
         ####################