###                
     ..                
     #.##  #           
...###..##.###.        
......†........        
      #.##             
      #..#             
      ##.#             
       #.##            
       #..#######      
       ##.......##     
        #.##.##..#     
        #r##'###+##    
        #.#...#...#    
        #b#...#≈.≈#  ≈#
        #.#...#≈.≈#.≈≈#
        #.#...#≈.≈#≈≈≈#
        #.#...#≈.≈#≈≈.#
        #.#...#≈.≈#≈..#
        #.#...#...#...#
        #.#...........#
        ..#...........#
        #.#...........#
          #...........#
          #.....<.....#
          #...........#
          #############