6
4
9
8
8
5
7
3
2
7
2
5
1
6
3
8
9
4
1
3
6
4
9
2
6
2
5
9
1
8
2
6
3
5
7
4
5
7
2
4
8
9
3
1
6
3
4
6
7
5
1
9
2
8
4
9
1
3
2
7
8
5
6
2
5
7
6
4
8
9
3
1
8
6
3
5
1
9
2
4
7
This Sudoku Puzzle has 19 steps and it is solved using Full House, Naked Single, Hidden Single techniques.
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