$ ###. ##...# ..... ...### ###<..^# ##.#...#### #^.#......# ### #..#..<..####.## ##....####.#..^# ∆ #.....#.#...^..# ##.[####.......^# #...#.#......#### #.....#..##### ##...#.....# ∆ ##.....^.##### #^#...#.## .# ###....sH..# ... .....#.##.##.... ∆ ....^..........^. .#.............## #^..#.s.##.....# ..?#......###..## #. ##....## ###∆ #...R. #....#..{ ..#.#.#.. ...#####§.. .. ..#