input           output
james	       james 2
dave		   dave	2
mike		   mike	3
ken		   ken	3
jon		   jon	5
jon			
ken			
jon			
mike			
james			
dave			
mike			
ken			
jon			
jon			

##</code><code>##

#!/usr/bin/perl
use strict;
use warnings;
use Tk;
use Tk::BrowseEntry;
use POSIX 'mktime';
use POSIX 'strftime';
open(STDERR, ">&STDOUT");

   ########  entry widget to get $yyyy $mmm $dd   #######################################

print "\n    Select Year			= $yyyy\n";
print "\n    Select Month		= $mmm\n";
print "\n    Number of Backup Days	= $dd\n";

     ########     create  input and output files    #######################################

my $filerror = "\n\n! Cannot open File below, please check it exists or is not open already?\n"; 
my $OUTFILE = "C:\\Temp\\$yyyy\$mmmAudit.txt";
my $INFILE1 = "c:\\$yyyy\\$mmm\\report.csv";
my $INFILE = "c:\\$yyyy\\$mmm\\names.csv";
#Open input file for reading and Output file for writting
open (INPUT,"$INFILE") or die "\n$filerror\$INFILE",,1;
#open (OUTPUT,">$OUTFILE") or die "\n$filerror\n$OUTFILE",,1; 

my $total_names = 0;
$total_names++ while (<INPUT>);
my $Month_total = $total_names * $dd;
     #########   get total number of rows in files   ##################################
print "\n    Total number of names is $total_names\n";
print "\n    Total number of names is $Month_total\n";
close INPUT;
open (INPUT,"$INFILE") or die "\n$filerror\$INFILE",,1;
     #########   keep only unique names and display number count of duplactes #########
my %seen;
while (<INPUT>)
{
    chomp;
    my $line = $_;
    my @elements = split (",", $line);
    my $col_name = $elements[1];
    print "    $col_name  \n" if ! $seen{$col_name}++;
}

close INPUT;