% slitherlink 443 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/443.a.htm
slitherlink
medium-
10 10
..1.2.3.3.
22...2..1.
2.....2212
1..12.32..
3.3.2.2.12
..2..3....
.....1..22
20...2.3..
.3.12.1..3
..23....2.
