% slitherlink 169 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/169.a.htm
slitherlink
medium
16 12
.333......3.....
..2121.1...2..3.
......3.....1..3
21131..3.3.3..0.
..22.3.20.22.3..
.213......1...22
2.2...212.3....2
22.2..21.322..1.
.1.103.2...21.3.
1..213..322....2
.2...231.1...2..
3.3..2...32.3..3
