% slitherlink 654 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/654.a.htm
slitherlink
medium-
19 10
.2..32...312.3.3.2.
3.213...1....2..3..
....1313.3...1.12.2
2.........3.3.122..
3332.....1.2.11.2..
.2...3.32213..2..3.
2.......2.....1..3.
...3..22.3..2321232
...2.22......2.....
.23.32.1..22....3.3
