###
                 ....
           ####+#....
           #.........
           #.........
           #<......^.
         ####.#.#####
         #.........# 
   #######.##.....## 
   #.......##.#.###  
   #.......##.#.#    
####.......##.#.#    
#..........##.# #.## 
#......###.##.#..... 
#......# #..YY.....# 
#......# ####+###... 
#......#             
#..[.<.#             
#......#             
########             
                   ∆