#      #.    
             #.     .     
            ##..  ##.     
          ∆  ...# #..     
              #..##.#     
              #.....#     
             ##.##..##    
         #.  #.....<.#    
         .......###.##    
     #####...##.##..#     
      .....#..#.#..##     
      #.#..##.#.#.##      
 ..####...).#.....#       
  )......##)##...#########
    ##...##.###..........#
  ###..O(......).........#
  #.....####...<#........#
....#.###  ##...#........#
.. ..       #...##########
 ...        #.#.#         
...         #.#.#         
..          ..#..         
.          #....##∆