% hitori 304 by Otto Janko, http://www.janko.at/Raetsel/Hitori/304.a.htm
hitori
medium-
10 10
6193427335
a334359978
7889694283
6a78293589
4546889a3a
782873a619
94413798a9
1745a53651
32478a519a
161a948442
