import sys
input = sys.stdin.readline

N,K=map(int,input().split())

A=[input().strip() for i in range(N)]

MAP=[["."]*(N*K) for i in range(N*K)]

for i in range(N):
    for j in range(N):
        if A[i][j]=="#":
            for k in range(i*K,i*K+K):
                for l in range(j*K,j*K+K):
                    MAP[k][l]="#"

for x in MAP:
    print("".join(x))