text: arq = open('mensagem.txt', 'r')
  sai = open('cripto.txt', 'w')
  for linha in arq.readlines():
      saida = ''
      for c in linha:
          if c in 'aeiouãõ':
              saida += '*'
          else:
              saida += c
      sai.write(saida)
  arq.close()
  sai.close()
  