.#     
##########.#     
 ........#.#     
 ##........#     
 #.........#     
 #.........#     
 #.........######
 #.†......O.....#
 #<........####..
 ##........#     
 ..........#     
##......####     
..........   ∆   
##......###      
 #...####        
   ###