% slitherlink 339 by Hirofumi Fujiwara, http://www.janko.at/Raetsel/Slitherlink/339.a.htm
slitherlink
hard-
20 16
3.12.0.333..0.3.32.1
.1..........13..0...
3..3..1.331.....2.3.
...3.3.12..32.3.1...
311.1.3.211......2.3
...3.0.1.....0.12.1.
.13.1.3.3..3....33..
.0...1..1.13.1.0...3
.1.....23...13..2.3.
1.3..3..1.31....3..1
1....023.1...01..1..
.3.33....3..3...1..3
1.1.1.1.....0.2..31.
.1.1..13..3..3......
.2.31.3.3.3.3.23.13.
3.1.......2..1...3.1
