r, c, zr, zc = map(int, input().split())

rows = []
for _ in range(r):
    row = input()
    new_row = []
    for c in row:
        new_row += [
            c,
        ] * zc
    rows += [
        new_row,
    ] * zr

for row in rows:
    print("".join(row))