% slitherlink 410 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/410.a.htm
slitherlink
medium-
10 10
.3..22..22
3..0.3...2
.2.2.1..12
3..0...2.3
1.32223...
2......13.
...23.3..2
3.........
..2222.231
232......3
