input: Write a function to check if two given integers are equal. If they are equal, return "The two integers are equal". Otherwise, return "The two integers are not equal". If either integer is not provided, return "Input missing".
  def check_integers_equality(first_int=None, second_int=None):
      if first_int is None or second_int is None:
          return "Input missing"
      if first_int == second_int:
          return "The two integers are equal"
      else:
          return "The two integers are not equal"
  
  assert check_integers_equality(10, 10) == "The two integers are equal"
  assert check_integers_equality(5, 10) == "The two integers are not equal"
  assert check_integers_equality() == "Input missing"
  assert check_integers_equality(15) == "Input missing"
output: def check_integers_equality(first_int=None, second_int=None):
      if first_int is None or second_int is None:
          return "Input missing"
      if first_int == second_int:
          return "The two integers are equal"
      else:
          return "The two integers are not equal"