def main():

  notCorrect = True
  while (notCorrect):
    day, mon, year = eval (input ("Enter day, month, year: "))
    notCorrect = False
    if ((year < 1900) or (year > 2100)):
      notCorrect = True
      continue
    if ((mon < 1) or (mon > 12)):
      notCorrect = True
      continue

    # check the day

  print (day, mon, year)

main()