% slitherlink 358 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/358.a.htm
slitherlink
hard-
20 15
.33...1..2......13..
...22....2..2.....21
131221.221.21.2...3.
.22232312232..0..3.3
.1.1....2...1..3.22.
322.....1..22.112.12
....303.3..2213..3..
....3....2.12...3.1.
.22...123111..3.3...
..3...22..........2.
.2.032.3...0.31.12..
..3..2.....2......2.
.30.....1..1.130.2.3
2212.2222.2...3.3...
......1.1.1..222...3
