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