% slitherlink 587 by Luke Pebody, http://www.janko.at/Raetsel/Slitherlink/587.a.htm
slitherlink
medium
19 16
...............1..3
.22.....3...22.....
.2..13..1.23232.1.2
1111......220....3.
23.1.3202...322..2.
.1..2.02.2.....2.2.
.3.22.2.2.2.3120.2.
221.1.02.23.2..122.
2...3..3....0....12
..3.1..1.0..32.13..
312.322..3...1.22.3
2232.1..1...2122323
22...12...33..3.2..
.12...1.222...1...3
...21.221.13..3..02
...21.2.33.....2.2.
