% nurikabe 211 by ooya, http://www.janko.at/Raetsel/Nurikabe/211.a.htm
nurikabe
medium-
17 17
..6..............
2...............5
..3.3.4..8..3..4.
.............2...
..2..............
4....4...........
................3
.......2..4......
......6..........
2........2.....7.
.............6...
..........2......
.......3...6.3...
...7..3..........
..b..............
.................
.1......5.4.4....
