#!/usr/bin/perl -w
use strict;
use warnings;

sub fifteens
{
    my $card = shift;
    $card =~ tr/SCHD//;
    $card =~ s/[JQK]/10/g;
    $card =~ s/A/1/g;
    my ($i,$o,$p,$k,$l);
    my ( @cards) = split /,/, $card;
    $_ = 0;
    # count the 2 card combinations that add up to 15
    for ($i = 0; $i<=$#cards;$i++){
        for ($o = $i+1; $o<=$#cards;$o++){
            $_ += 2 if (( $cards[$i] + $cards[$o])== 15 );
            for ($p=$o+1; $p<=$#cards;$p++){
                $_ += 2 if ($cards[$i] + $cards[$o]+ $cards[$p]==15);
                for ($k=$p+1;$k<=$#cards;$k++){
                    $_ += 2 if ($cards[$i] + $cards[$o]+ $cards[$p] + 
+$cards[$k] ==15);
                    $_ += 2 if ($cards[$i] + $cards[$o]+ $cards[$p] + 
+$cards[$k] + $cards[4] ==15);
                }
            }
        }
    }
    # count the 3 card combinations that add up to 15
    $_;
} ## end sub fifteens

print "hand = A,2,3,4,5 \tTotal =", fifteens ( "A,2,3,4,5"), "\n";
print "hand = 5,5,5,J,5 \tTotal =", fifteens ( "5,5,5,J,5"), "\n";
print "hand = 6,7,8,9,5 \tTotal =", fifteens ( "6,7,8,9,5"), "\n";
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