#.                                
        #..                               
        #...         ##                   
        #...##+######..#                  
        +.......<.......                  
        #...............  >..             
        #...##..##.#####  ...             
.##     #...##..##.##..###.##             
...     .....^..'...........#             
 ...    ........#...........#             
  #..   ##..##..##.....##..##   #         
.##..#####..##..##.....##..##....         
.......{.#..#..........'.........         
........o#..#..........#.........         
 ##..##.##..##..##.....##..########  ##   
  #..##o##..##..##.....###+####...##..##  
  #....................'...............#  
  #....................#...............#  
.......................#...............#  
............##..#########...###.#..#..##  
o##.........##..###....##...###.#### ##   
  #..#########...'...........#...#        
  ###        #...#...........#...#        
             #..###'##.####.###.#######   
            #######.##.####.###...#...##  
            #...#...#............#.....#  
            ##..#...#............'.....#  
             #..'...+......>.....#.....#  
             #'####.###..######.###.######
            ##..###.###..##..##.###.###..#
            #.>...#..'..........#...#....#
            #.....#..#..........#...'....#
            #....##..##..##.....######..##
            #.#####..##..##.....#    #### 
            ###   ....#..##.....#         
                 #....+..########         
                 #...<#...                
                 #....#....     ∆