####
      ##############.....
      ... ...............
      #..   #.##.<.......
#     #.#   #.##.###.##..
#.#####.#   #.##.#       
#.....#.#####.##.#       
  #...........##.#       
   #...a.........#       
  ###.....##..######     
 ..................#     
#....................    
###..#...###.#####.##    
  #..#.... #.#     #     
  #..#....##.#           
  #..###..##.#           
       #..##.#           
       ..  ...