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