50 50
..................................................
.#.......#....#...#......##...........#...........
..................................#...............
.....#.......#...#..................##........#...
............................#.....................
..#...........##..............#....#..............
....................................#.#.#......#..
..#.........#...#..........#...............#......
..#..........##.#.....................#...#.......
...##...#............................#.#..........
..........#...#..........#............#........#..
...........#..#........#...........#.........#....
................#....#............#......#....#...
......#.............BB.............#..............
...........#.......BB.......#.....................
....##............................................
..#.#...........#.....................#.........#.
.....................#......#...........#.........
.............#....................................
...........#...........#...#......................
.............#..##...................##...#.......
....#..##......#...........................#......
.......#..#...#...............#...........#..#....
......................#.#...............##......#.
............#....#....#...##...#............#.....
...............................#........#...#.....
............................#...................#.
......#...#...#......#...................#........
......#......#..#..............#......#...........
......#..........#.....##.#.......................
....#.#............#.....#.#.......#..............
...............................#.............#....
...#....................#......................#..
....#....###...........#........#.................
.#........#.......................................
.............................#.#...........#......
.......................................#..........
..#...#....#.........#...##....##.......#.........
.........#....#...........#............#...#......
........#.....#.......#...................#..##.#.
.........#...........................#......#.#.#.
....#......##...........................#......#..
....#.......#..........#..................##..#...
.....#.........##.......#.....#...................
......#.......#.......#...........#...............
..#.....#...............#.............AA..........
...#...............................#.AA.........#.
..................#........#......................
.....................................#............
..................................................