% nurikabe 159 by ooya, http://www.janko.at/Raetsel/Nurikabe/159.a.htm
nurikabe
medium
24 14
..3...4.......3....4..3.
.4.......1.4............
........7...3.........4.
...............5.....3..
....2...2...............
...3........4.........2.
..........4..3..........
...4...................1
....2.7..1...2.....2....
1.........5..........3..
.....4...3..3....a......
6...............5.1.....
....................2...
........7...3..4.....8..
