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