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