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