I have a pearl script that right now takes a tracking file and from our shipping software and converts it into the format we need to import into our Software. the issue is the tracking # is too long and I just found out from our carrier that we can strip the first 8 characters. Is this possible?

here is the current code ("trackingno") it the ending field

use Text::CSV_XS;
use Date::Manip; 

sub trim($);

# Formatting variables
$quote_char = '"';
$sep_char = ',';
$NumHeaderRowsToSkip = 6;
#$AuctionSite_EmailBlank = "amazon|pay";


$out=$ARGV[0];

# Name output file
$out =~ s/(^.*).csv/$1-FS.txt/;

# open file handle for output file
open OUT, ">$out" or die "Cannot open $out for write :$!";


# Remove linefeeds and build array
while (<>) {
        chomp;
        push (@rows, $_);
}

# Init csv object
$csvin = Text::CSV_XS->new({
    'quote_char' => $quote_char,
    'sep_char' => $sep_char
});

$csvout = Text::CSV_XS->new({
    'quote_char' => $quote_char,
    'sep_char' => ",",
    'always_quote' => true
});

# build array of header fields
$headers = $rows[0];
$csvin->parse($headers);
my @headers = $csvin->fields;


my @rowscolumns = map { chomp; $csvin->parse($_); [$csvin->fields]; } 
+@rows;


# build array of hashes with column name as hash index
foreach my $row(@rowscolumns) {
   my %hashrow;
   my $index = 0;
   foreach my $val(@$row) {
      $hashrow{trim($headers[$index])} = trim($val);
      $index++
   }

  push @arrayhash, \%hashrow;   
}

$arrayhash[0]->{'Reference'} = 'Reference';
$arrayhash[0]->{'trackingno'} = 'trackingno';
$arrayhash[0]->{'packwt'} = 'packwt';
$arrayhash[0]->{'shipdate'} = 'shipdate';
$arrayhash[0]->{'paytype'} = 'paytype';

# construct output csv lines
my $index = 0;
foreach my $row(@arrayhash) {

    if($index>0) {
       $row->{'shipdate'} = &UnixDate(&ParseDate($row->{'shipdate'}),"
+%m/%d/%Y");
    }
    my @output_fields = (
            $row->{'Reference'},
            $row->{'trackingno'},
            $row->{'packwt'},
            $row->{'shipdate'},
            $row->{'paytype'},
                        );
    $csvout->combine(@output_fields);
    $outrow[$index] = $csvout->string;
    $index++;                        
}

#print result to file
foreach (@outrow) {
   print OUT "$_\n";
}

sub trim($)
{
    my $string = shift;
    $string =~ s/^\s+//;
    $string =~ s/\s+$//;
    return $string;
}
[download]

any help would be appreciated! thanks.