% slitherlink 593 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/593.a.htm
slitherlink
medium-
18 10
.02...1.0.3.0.3.32
3..2.2.1.3..3...0.
.....3...2.....33.
3...2.3.1.2...2..1
....232..33....33.
.22....02..011....
3..3...2.3.1.3...1
.10.....0...0.....
.3...3..3.1.3.3..3
12.2.0.2.2.0...11.
