5
6
1
7
8
4
2
3
9
7
2
9
6
5
3
4
1
8
3
8
4
1
2
9
5
6
7
2
9
3
8
6
1
7
4
5
8
1
7
3
4
5
9
2
6
6
4
5
9
7
2
3
8
1
4
7
2
5
1
8
6
9
3
1
3
6
2
9
7
8
5
4
9
5
8
4
3
6
1
7
2
Given Values
-
Values found by backtracking