........... . ∆ ..........# .. .........# . ... # ... ........###.# ##.# ..# .... #......# #...# # ...... ?....##......##... .# ..##. .........................# . ........u.....#.. ..#....X. . ..#?..###.####.###... ... # ##.####5.....##..#...##. ## .. #.#...##...#..#..#..# .. #....#3.#.#.#...### #. . .# ####.#55..#. #... . .########.#.#. # . #. ##3 .#..# #. .# # .# #. #. #.#...# .# . ..#.#. . # . .. .# # #.. # #3 . .