. .# ∩ . . # . .. .. . # # # #. ##.#.. .# #. . .## . . #:#....#.. .# ...##...# .# # #..........#.# # # # ......# # .##..# ..#.#..# .. . ....##...## .# ....#.# #...# ! ...##.#..#..# #. .#..##..# . .. #.#..## #.# ..##...... ## .s . #.##..#..## # .. #....#..# #.# ##. #X##.. #####(##. #5#5# ##..# ####