% slitherlink 404 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/404.a.htm
slitherlink
medium-
10 10
..1323.23.
1.3.2.2.13
.021....1.
.23..22.2.
22221..22.
2.12.1....
.3.13.3.3.
221231.2..
2.......23
..1.2...13
