% slitherlink 347 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/347.a.htm
slitherlink
medium-
10 10
....22.23.
.3.21..2.1
...212.132
2.1.22.321
.....111.2
..2.2..222
3....2222.
.021.13.2.
....2.3...
3.2.223...
