% slitherlink 356 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/356.a.htm
slitherlink
hard-
20 15
.1.33.3...1233..222.
.........1.2..23.32.
.1...23.3.3...211212
3.21323....31.1.....
31.0....3...13...3.3
.2....22..23.222.1..
...221.132..1..3.3..
3....2.2.2..12....13
2.0.2..3..23.3....32
2.2..121......212..2
.2.213.32..3........
332.....032.3..1.231
11.......3.....13...
....32.2...2.2.2.12.
3232.32..2..1..32..2
