def METHOD_NAME(prefix, input_string):
    """
    Check if `input_string` starts with `prefix`.
    :param prefix:                  prefix we want to check
    :param input_string:            the string we want to check
    :return:                        True if the input_string starts with prefix else False
    """
    return re.match(r"^" + prefix.value, input_string.value) is not None