% slitherlink 380 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/380.a.htm
slitherlink
medium
16 12
.......2......2.
2..22.2.2..21..2
3.1.331.12.13..1
..3...23.....12.
22.232121..33.31
.1......2..2...2
.3..1.3..3.31...
.1...3.21....1..
.33.2...2..11...
....2.....3.113.
..1...3.2232....
.3..131..2..3.3.
