##### ...#.# ∆ .. .#.#.# . .....>. . ..#.#.# #. .#.#.#.#.# #. .#.#.#.#.# #####.##.#..<#.#.# ∆ .........#.#...#.######.# .........####.##........# ......................... ........######.##.############ ...............# ############