n, k = map(int, input().split())
A = [input() for _ in range(n)]
res = [[''] * (n * k) for _ in range(n * k)]
for i in range(n):
    for j in range(n):
        for x in range(k):
            for y in range(k):
                res[i * k + x][j * k + y] = A[i][j]
print('\n'.join(''.join(row) for row in res))