% slitherlink 777 by Palmer Mebane, http://www.janko.at/Raetsel/Slitherlink/777.a.htm
slitherlink
very hard
24 14
.220.3.0.22.0.2.........
...............3.3023.30
0.23.31031.331..........
..............1222.12.12
.33122121.221...........
.............3.2.32.3.22
121013.33110............
............21.13.131132
31.1.12.2.1.............
...........310.31122220.
02.33.2202..............
..........111.33311.31.1
30.2023.3...............
.........2.1.33.1.1.202.
