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6
3
4
9
3
7
8
9
4
4
7
9
8
3
1
7
8
4
6
9
9
7
5
3
8
2
4
3
7
5
8
3
1
7
9
4
9
5
8
6
4
2
6
9
5
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6
3
4
7
9
3
4
9
7
8
9
4
8
3
1
7
9
2
4
8
7
5
3
4
6
9
3
8
7
5
8
3
9
5
6
1
7
8
6
4
9
9
4
2
5
1
2
3
4
5
6
7
8
9
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