.c.            
  ...   ∆        
  ...            
  #.#            
  #.#            
 ∆#.###          
  #.#..          
  #.#.########.# 
  #.#...<....... 
  #.#..#.###.... 
  #.#......#∆  # 
  #......#.#     
  #......#.#     
  ##....##.#.####
#  #.......#.....
#.#######........
#................
 ###.............
   #.............
   #.............
   #...s.........
   #.............
   #.............
   ######......( 
         ....... 
         ....... 
         ....... 
         ....... 
         #######