(hand_value)
:param hand_value: int - current hand value.
    :return: int - value of the upcoming ace card (either 1 or 11).
def value_of_ace(hand_value):
    """

    :param hand_value: int - current hand value.
    :return: int - value of the upcoming ace card (either 1 or 11).
    """

    pass
def value_of_ace ( hand_value ) : pass