What is the position of the number 7? Enter your answer in the form `\boxed{rXcY}`.

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