% kuromasu 221 by Otto Janko, http://www.janko.at/Raetsel/Kuromasu/221.a.htm
kuromasu
medium-
10 10
d.....7...
c.........
.4.......b
........9.
...8.3....
....8.3...
.4........
i.......b.
.........c
...9.....a
