% slitherlink 561 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/561.a.htm
slitherlink
medium-
10 10
..2.01....
3.2.2..33.
...1..0...
1.3..3.23.
..1.1....3
2....2.3..
.32.3..3.3
...3..0...
.30..1.1.3
....23.3..
