% hitori 440 by Otto Janko, http://www.janko.at/Raetsel/Hitori/440.a.htm
hitori
hard
17 17
b563geg93c4dhb71b
ff39bdefaf18424hg
8f36gcf279d5d4agh
6b73a3b58ddefgdc1
g66c829bh4h17a3fe
7525f4g56b59c1da3
b33g181fda617a94c
31e5dahdb68f276aa
2ghae7c4bf9116836
4hc7eb5df886ac121
3cbh73ae353389492
h1cfc5499e3ag9b71
1d3b4a6acag2fh2e5
b1f1c657g2b839h8d
cfdega8h81f8836g7
94ad1h7a2gf365eb8
5f4g8g81e1c2ab6ad
