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