% slitherlink 342 by Hirofumi Fujiwara, http://www.janko.at/Raetsel/Slitherlink/342.a.htm
slitherlink
very hard
20 16
31..21.32..23.12..22
..21..1..31..1..13..
..13..3..30..0..13..
21..22.10..22.21..23
..31..3..11..2..22..
..13..1..22..1..13..
30..23.12..22.20..31
..31..2..21..1...1..
..22..0..13..3..21..
31..13.32..01.31..21
..22..1..33..2..11..
..23..1..11..1..33..
23..20.21..12.32..03
..22..3..22..1..01..
..02..2..33..1..23..
31..11.31..11.12..22
