% slitherlink 781 by Tom Collyer, http://www.janko.at/Raetsel/Slitherlink/781.a.htm
slitherlink
medium-
10 10
1122112211
2........2
1.1.1.1..2
2......2.2
1...31.3.1
2.2.20...2
1.1......1
2..3.3.3.1
1........1
2212212212
