Given two integers N and M, and a starting point with coordinates (x, y). You are asked to create an N-by-M matrix as follows.
Four integers separated by blanks. The first integer (N) represents that the matrix has N rows. The second integer (M) represents that the matrix has M columns. The third integer (X) and the fourth integer (Y) represent the coordinates of the starting point.
( 1 <=N,M<= 15, 0 <= X < N, 0 <= Y < M )
Note that (0, 0) is on the most top-left of the matrix.
The N-by-M matrix. Print the elements of the matrix using the format "%c". Each row is ended with a newline character '\n'.