% slitherlink 738 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/738.a.htm
slitherlink
hard-
16 12
..21..3.....21.2
1.33.3...31.....
..0...2....2122.
2.1...121.321...
3.....3..21...1.
2..22.....2.....
.....2.....21..2
.3...11..2.....1
...222.301...0.3
.1031....2...2..
.....32...3.12.1
2.12.....2..11..
