% slitherlink 284 by Hirofumi Fujiwara, http://www.janko.at/Raetsel/Slitherlink/284.a.htm
slitherlink
medium-
10 10
13..32..33
22..11..22
..20..21..
..33..31..
22..22..32
31..31..13
..11..11..
..21..32..
23..10..12
22..22..13
