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