% slitherlink 170 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/170.a.htm
slitherlink
medium
16 12
.3.32.2.21...1..
3..3..2.....1.31
3..20..2..2...3.
222..3..32.13...
.2...3.2232...2.
31..3........212
12....23.3.22.2.
..2.3.......33..
.....222..1..22.
..0.11.1...3...2
.213.2....222.31
.....22.....2..3
