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the solution:
8
2
3
1
9
4
5
6
7
9
7
1
5
3
6
4
8
2
4
5
6
2
8
7
1
3
9
5
9
7
6
4
8
3
2
1
1
6
8
3
5
2
7
9
4
2
3
4
9
7
1
8
5
6
7
4
5
8
2
9
6
1
3
6
8
2
4
1
3
9
7
5
3
1
9
7
6
5
2
4
8