% slitherlink 551 by Luke Pebody, http://www.janko.at/Raetsel/Slitherlink/551.a.htm
slitherlink
medium-
10 10
32222222.3
...2...131
...2.3.2.2
..2213.2..
.2...3...3
3.33.32212
1...23.2.2
.....22..2
..3..2.2..
23..23...3
