.# ... . #. ##.. ## ... . ### # ..#.# ..#. . ## ..## #.##.###..## #..##..#...#∆ ∆ #.∩##..!.## #..o4.....# #...3....#.. #...##....#....# #..## #.....###.. .. .#.....# .. ##........ # . #.#.....# #.#..#.#.