##########++
      #...........
∆∆∆+  #......#..# 
####.##.......... 
......'...........
#+#####......#..#.
      #...........
      ####'#####+ 
      #.......#   
      #.......#   
      #...S...#   
      #...<...#   
      #.......#   
      #.......#   
      #.......#   
      #########   
                  
          ∆∆∆∆    
          ∆∆∆∆