% slitherlink 733 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/733.a.htm
slitherlink
medium
12 12
3.31.1..2233
.....02.0...
1.......1...
.2..0......1
3.3.22.1.3.3
...........1
1...........
0.1.3.33.3.3
1......2..3.
...2.......2
...2.31.....
1333..0.11.3
