.             
  # .   ###     .
  ..#.  ..# ###..
  ....# #.##.#.. 
    ...#....#.#  
   .. ..#..#.#   
 #.... #..∩.###  
 ..... ##.#...#  
##...#.#.4(.# ## 
#. ##..#....# .##
...#.....#....# .
...#..#....#.....
..#....#.....##.#
.#...#.##..#.#  #
.#......#.#.#.#  
......#.......#  
#∩.#..##....#.#  
..# ##.##....... 
...#.## .....#..#
# ..... # ##.....
 ....# #.#. ...t.
#.. #...# # .... 
# #..#..#     ##.
 ##.. ###