use strict;
use Time::Local;
use warnings;
 
my $counter = 0;
my($address) = @_;
my $str;
my $flag=0;
my $file = 'ListOfIpAdress.txt';
open my $fho, '>', 'ListOfIpAdress2.txt' or die "Could not open file $!";
open my $fhi, '<', 'ListOfIpAdress.txt' or die "Could not open file $!";
while (my $line = <$fhi>) 
{   
     my ($a1, $a2, $a3, $Day, $sMonth, $sDate, $sTime, $SYear,$a9, $a10) = split(/ {1,}/, $line);
     my $str1=  $sMonth." ".$sDate." ".$sTime ;
     my $scTime = localtime;   
     my ( $cDay, $cMonth, $cDate, $cTime, $cYear,$Syear) = split(/ {1,}/, $scTime);    
     my  $str2=  $cMonth." ".$cDate." ".$cTime ;
     use constant Year => 2015;
     my $t1 = convert($str1);
     my $t2 = convert($str2);
     my $Diff= $t2 - $t1;
     my $div = $Diff/3600;
     print "Total Difference in Hour is : $div \n\n";
     print $fho $line unless $div > 38;
}
print "\nn check1 \n\n"; 
close $fho;
print "\nn check2 \n\n";
unlink ($file);
if(-e $file) 
{
   print "File still exists!";
}
else 
{    
   print "File gone.";
}

 sub convert
{
    my $dstring = shift;

    my %m = ( 'Jan' => 0, 'Feb' => 1, 'Mar' => 2, 'Apr' => 3,
            'May' => 4, 'Jun' => 5, 'Jul' => 6, 'Aug' => 7,
            'Sep' => 8, 'Oct' => 9, 'Nov' => 10, 'Dec' => 11 );

    if ($dstring =~ /(\S+)\s+(\d+)\s+(\d{2}):(\d{2}):(\d{2})/)
    {
        my ($month, $day, $h, $m, $s) = ($1, $2, $3, $4, $5);
        my $mnumber = $m{$month}; # production code should handle errors here

        timelocal( $s, $m, $h, $day, $mnumber, 1900 );
    }
    else
    {
        die "Format not recognized: ", $dstring, "\n";
    }
}