3. ## #. .. ###.# .. .##...##. ## .#...#. W.# ..... #.. ... # ... #.# ## .. #.##.##.#..# #..#......# .. # #....##... .. # #.#...# # ......#.#.# ..# #.#. #.##....# #4#..##........ #§#§. .##..#... #..X#... ...... 4 # ###.#####.#. . #.##.... .# #.##..## . # #.##.#.# #.# ##.#.. .##.