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

my $tag = shift;
die ("You need to enter a tag.\n") unless  ( $tag  =~ /\w+/ );
my $count = 0;
my @headers = ();
my %hash = ();
while(my $d = <DATA>) {
    $count++;
    chomp ($d);
    if ( $count < 2 ) {
        @headers = split/:/, $d;
    }
    else {
        my @temp = split/:/, $d;
        push @{$hash{$headers[$_]}}, $temp[$_] for ( 0 .. $#headers );
+ 
    }
}

if ( defined($hash{$tag}) ) {
    print "$tag = ",join( ',', @{$hash{$tag}} ), "\n";
}
else {
    print "Tag $tag not found.\n";
}
__DATA__
AGE:EYES:HAIR
32:BLUE:BLONDE
54:BROWN:BROWN
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C:\Code>perl show_tags.pl foo
Tag foo not found.

C:\Code>perl show_tags.pl AGE
AGE = 32,54

C:\Code>perl show_tags.pl EYES
EYES = BLUE,BROWN
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