# Assumption: @hand[0]<val> == 5;
sub is_good( @hand ) returns Bool {
    # If you have a 10, J, Q, or K anywhere in @hand, you win.
    if any(@hand<val>) == 10 {
        return true;
    }

    # If you have more than one of anything, you win.
    my %cardvals;
    %cardvals{ @hand[0..4]<num> }++;
    if any( %cardvals.values ) > 1 {
        return true;
    }

    # If you have 3+ cards in a row, you win.
    for 1 .. 11 -> $start {
        if all( @cardvals{ ($start, $start+1, $start+2) } ) {
            return true;
        }
    }

    # If +%suit{@hand[0..3]} == 1, you win.
    # Note: The suit of the cut-card is irrelevant.
    my %suits;
    %suits{ @hand[0..3]<suit> }++;
    if +%suit == 1 {
        return true;
    }

    # Alternately, this could have been written:
#    if all( @hand[0..3]<suit> ) == any( @hand[0..3]<suit> ) {
#        return true;
#    }

    return false;
}