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