20 15 1 4 .........#..... #......##...... .....S##......# ..#......#..#.# ............... ..##.##..#..... ##...#..#...#.. .#..#........#. ....##..#..#... ....#.#.....##. #.......#...... ....##.......#. .....T......##. .#..#.........# ............... ..#......#....# ............... .......#......# .#...#..#.#.#.. .#..#..#.......