. # .### #.######...# # #.4......# #.###...# # #.....#.# .##.#....#.# #. #..##.#.# #.#####...# ##. .#...#.... #.#.##.### ..#.# ##.#..## ...... #. #..# .#..### .#...#.. #.#... . #.# .## . ... ∩#.. ..# ## ### .. # .#.#