def card_abbrev(value, suit):
    """
    Constructs an abbreviation for the card, using the given
    value, and suit.

    :arg str value:
        The value to use.
    :arg str suit:
        The suit to use.

    :returns:
        A newly constructed abbreviation, using the given value
        & suit

    """
    if value == "Joker":
        return "JKR"
    elif value == "10":
        return "10%s" % (suit[0])
    else:
        return "%s%s" % (value[0], suit[0])