# . # # .## #.. ##. . # # # . ##. # .. .##. #X # # # ∆ . # #...# # # . ..## #. #. ...##.##.... ##. #...##. #.#.#....### . ### #.4#.# # 4..#..# . #. .#.# .#.. #..#.#### . . #..#..#.. # # .# . # . . #........### .... # # # # . ..#....#.... # . .. .### .. # ....#. #..# # . ... . #. .##..## .# # .#.. # . #.......#§..# # #. ..# . ###...#.#..##..# . .# #. ## #..##### ∆.# .# . . .. .# ##.#.## ?.. # # #... . # ##..##.#§# #. . . . # # #.#.#.#.....#. # # . #.#.#.####..#.#.#. ... ........X4.......# . .. .#.....W.......§.# #....x.##....§.. ......§m.### ....## ##...§....# ...# #.§....... #.#.. ##....t.... .. # ..§......... ## #.......§.... .