###########                          
##           #.........#                          
?..          #.........#########                  
...>         #.................#                  
.....        #.................#                  
.....(################.........###############    
......'....o.........'.........'.........[...>    
......################.........#####.....####..# #
.....      #######   #.............#.#...........#
....       #....(.   #.........###.#.#.#.####).#  
###        #......   #.........#   #.#.#..<....#  
           #......####.........#   #.#...#.##.##  
           +......'..'.........+  ......)....     
           #.....†####.........#  .#.#.#.#.##.#   
           #......   #####'#####   #........  .#  
           #..h...       #.#       ........#   #  
           .......       #..      ..........      
           .h.####       ####     .#........    ∆ 
           hh.                                    
           ..                                     
                ∆