8
2
4
5
7
3
1
6
9
5
7
9
1
6
2
3
6
8
3
6
1
4
9
8
2
5
7
7
4
6
3
4
1
2
8
5
9
2
3
6
8
7
6
1
4
1
8
4
9
5
2
1
7
3
6
1
2
4
3
7
5
9
8
8
4
5
2
9
6
7
3
1
7
3
9
8
1
5
6
2
4
This Sudoku Puzzle has 31 steps and it is solved using Full House, Naked Single, Hidden Single techniques.
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