input: def differentiate_list_tuple(data_type: str) -> str:
      """Given a data type, differentiate between a list and a tuple in Python.
      >>> differentiate_list_tuple('list')
      'A list is mutable, meaning its contents can be changed, and it is surrounded by square brackets [ ].'
      >>> differentiate_list_tuple('tuple')
      'A tuple is immutable, meaning its contents cannot be changed, and it is surrounded by parentheses ( ).'
      """
output:     if data_type == 'list':
          return 'A list is mutable, meaning its contents can be changed, and it is surrounded by square brackets [ ].'
      elif data_type == 'tuple':
          return 'A tuple is immutable, meaning its contents cannot be changed, and it is surrounded by parentheses ( ).'