% slitherlink 166 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/166.a.htm
slitherlink
medium
16 12
.3.......22.3...
23.2.32.223.313.
...1.2.32..1.1..
1...3.3...2322..
.3.2..3.3...2...
2....3.2.1210.22
.3.3.2.1.2...32.
12.3.2....132...
.12.1.2121.2....
.2....223...32..
.112...2..11222.
.3.213...2.22..2
