Background

Mirko is looking at a magazine through a magnifying glass.

Problem Description

He is looking at a magazine of $r$ rows and $c$ columns. The magnifying glass has two parameters, $zr, zc$, meaning that each character is converted into a matrix of $zr$ rows and $zc$ columns.

Given the original magazine, help him find the image of the magazine under the magnifying glass.

Input Format

The first line contains four integers $r, c, zr, zc$.

The next $r$ lines each contain $c$ characters. The characters may be digits, letters, or ..

Output Format

Output a matrix with $r \times zr$ rows and $c \times zc$ columns, representing the image under the magnifying glass.

3 3 1 2
.x.
x.x
.x. 

..xx..
xx..xx
..xx.. 

3 3 2 1
.x.
x.x
.x.

.x.
.x.
x.x
x.x
.x.
.x.

Hint

Constraints

For $100\%$ of the testdata, it is guaranteed that $1 \le r, c \le 50$ and $1 \le zr, zc \le 5$.

Notes

This problem is translated from COCI2006-2007 CONTEST #4 T2 SKENER

Translated by ChatGPT 5