N,K = map(int,input().split())
ans = [['.' for i in range(N*K)] for i in range(N*K)]
for i in range(N):
  a = input()
  for j in range(N):
    if a[j] == '#':
      for h in range(i*K,(i+1)*K):
        for w in range(j*K,(j+1)*K):
          ans[h][w] = '#'
for res in ans:
  print(''.join(res))