##
                  .. 
                O..  
      ∆        ..#   
            ###..#   
           ##..s.#   
  ..      ##..O#.##. 
  #.  #####.#.#..... 
  #.  #...........#. 
#.#.###.###.#.#.#.#  
#.#............##.#  
#.#...#.####..###.#.#
#.......## #........#
#........# ##...#....
#........####.....## 
###....#...#..###..# 
  #...####...##$##.# 
  ##†..#...#.# ∆$  # 
   #...#.###.#  $#   
   #<......#.# ∆ #   
   #..####.#.# ∆     
   #..#    #..       
   #..#    ##.       
   .).#      #       
   ...#              
   ####