##                    
 #.###          ##     
 #.x..#        ..###   
.....#.#######.##..    
.#..#..#...#......     
.......x#.. ### .      
......#.##.∩..#.#  ..  
.#..#...#. ...#.#  .#  
#.....##.##.....#  .   
..#... #...#..##. ..   
  #.## .##.....# .#.   
 ..# ##. ..###X##.#    
#..   # #..# .## #     
..      #...##..###    
        ...  ..#..#    
        .# #...#.. #   
      ..# ##   #. .#   
      . #.. ##..#.# # #
         #... #. ......