% slitherlink 661 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/661.a.htm
slitherlink
easy+
10 10
.2.221...3
.2.2..233.
....21.1..
2211.23023
....313...
232...3223
...2..2.12
..110.1.22
..2.....22
...1.1...3
