% slitherlink 447 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/447.a.htm
slitherlink
medium-
14 10
322.3.12...2.3
.3.1.1...23.3.
1.23.....2.1.3
.....22.2.3222
312.33........
..212....2.2..
3......3...13.
.322......13.2
...13.13.3.122
3.21.2.....3..
