########                             
      #......#                             
      #.....(#                             
      #......##########....                
#######....................                
...............O...........                
...........#####..........#                
.......<...#   #..........#                
...........#   #..........#                
..)........+   #..........#                
...........#####..........#                
...........(((.)..........#                
.........(......(..........                
................(.#####....                
.....###########.(#     ...                
 ....          #..'.     ..                
  ..           ####..     .                
                   ...                     
                    ..                     
                                           
                                           
                                           
                        #.#######.......   
                        +...........(...   
                        #(r.............   
                        #.......(.......   
                        #...............   
                         #...(..........∆  
                         #(.(...........   
                         #.......##########
                         #.......#...Y....#
                         +......<#....r<..#
                         #......Y#....Y...#
                         #.......#..).....#
                         #.......(........#
                         #.......########.#
                         #........      #.#
                         #.........     ###
                         #.........        
                         #..........       
                         #..........       
                          .......∆