% slitherlink 448 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/448.a.htm
slitherlink
medium
16 12
.3..3..32....22.
2.1.3.3.132.23.3
1.1....3...1....
.2..2.2.12.2....
3.3....3..32..21
..2.111.....1.2.
.2.3.3..2.31.2.3
332.2......2..2.
...3..2...23.202
..2.1..11.1..22.
.1.3...333..2222
3.3.23....23.2..
