% slitherlink 176 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/176.a.htm
slitherlink
hard-
20 15
.3....33.3.3.33.3213
..12312.3....2.22323
13..1.2....2...12212
....3.22.2.....2.2..
.13.2.2..32.2.....12
..2.22....322.2.3...
2.1.2.2212.1.232..2.
.202.2..2..2...2.3..
1.1...2...31..23.32.
2..312..3..2........
.....2.1.0....2....1
2........23..121222.
1..3.213..3.1.32....
..03.31.13.22..0.13.
..2...3.....1..3...2
