% slitherlink 522 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/522.a.htm
slitherlink
medium-
10 10
..3.23...3
1..0...31.
.0..31..2.
......3...
3..2.1.2.0
1.2.3.3..2
...3......
.1..13..0.
.33...0..3
1...02.3..
