% slitherlink 641 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/641.a.htm
slitherlink
easy+
10 10
...222....
.322.233.2
11.3..0.12
2.23...332
3..23..2..
322..11323
3......3..
3122.2.323
31...02..2
232..33.3.
