% slitherlink 468 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/468.a.htm
slitherlink
medium-
18 10
.31...3..2..3..0.3
2...21...3.2.1..3.
2.3..2.02.22..3.3.
....3..1...01.3...
.3.3.2..3..1...323
230...0..0..3.2.1.
...3.11...2..0....
.2.0..32.21.3..1.0
.2..1.3.1...01...2
0.3..3..1..3...32.
