.#   
   #   #.#   
   #.  #.#  #
####.###.# .#
.........# .#
.........#..#
.........#..#
      #.....#
      #.S#..#
      #.<#  #
      #..#   
      #..#   
      #..#   
 ∆    ####   
             
 ∆