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