#   .. 
         # .  #.# 
    ##    #. ...##
     .## ..##.....
      .. #....#.# 
#.#  ##. #.....#..
.#    ..##........
... . ##.#...#    
 ..#. #...#. . ..#
. ..####.###.. #..
.##..#v.v..####   
..#.##...#....#   
#..#.v..#....#... 
#...#.#. ..###  . 
#.#.#.#.##...     
. .##..## ....    
...###.[∆ .....   
# .#  .#  .##..