idnr = 170966
6 3 7 3 4 1 9 4 4
7 4 3 5 1 3 8 3 6
4 1 2 5 3 7 1 6 8
7 7 2 4 3 8 2 2 4
9 1 4 4 2 5 6 7 3
1 8 5 8 7 8 2 4 4
3 9 3 2 6 4 7 5 2
2 7 6 7 1 3 4 1 5
2 5 9 1 4 9 7 8 7
Difficulty: Easy