13 4
..bd...#.#.bb
b#...dA#a..#a
.#b#.ba.dba.#
#.b#.d...##.d
#a#..#.#b.dbc
.##.db.db.b#b
.#.##.#.b.a#.
..a.##....##.
#b.bdb....a.#
#.#.#bb.#.#ab
bbd#.d#.#a##a
.##...#.D#..#
.b#.#..#B..C.
