## .# #.# #..##### #.#.#.# # ###.xx## ## # #.#....# .....#..##...... .#......#####..# ....#.#.#..#...# ##.####x ........ #...#..##.# .#. ∆ #..#x..# #. ##....#..# ..###..##.##.... ###.....#.#.#.#... # ...### ..# #..##.# ..#.# #......... . #....x....###.## #### . ...## # .#...##..# ##.#.... ..#. . ##. #.#.## . .##.#...#.. ... ......### ## .. ##.# # # #..