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