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