In his Introduction to Customer Service culminating project, carminite plans to use a revolutionary technique called "Chunk Loading" where only items in a region around a point is shown on a screen. He talks of saving computing power and creating less volatile games with this idea and, because he's actually pretty dumb, asks you to implement this idea.

### Input Specification

The input will consist of one line with integers X and Y, 1 ≤ X, Y ≤ 20, the map dimensions.

The next Y rows will have a string of X characters each.

The final row will have integers A and B, the 1-indexed coordinates of the chosen point on the map, and an integer R, 0 ≤ R ≤ X, Y, the radius of the square of which chunks should be loaded (essentially a 2R+1 length square with (A, B) at the center).

### Output Specification

A visual representation of the loaded chunk region. Chunks outside the map are shown with character '.'.

### Sample Input

5 5asdfhqewruashsdqeuyeawery2 2 2

### Sample Output

......asdf.qewr.ashs.qeuy