#This is just the command to be called in execu  
my $inputfile="perloutput";
my $endfile=".txt ";
my $smb="> ";
my $outputfile="output";
my $smb2="&";

while ($index<16)
{
   my $testpath="chirp_md5sum ";
     $testpath=$testpath.$inputfile.$index.$endfile.$smb.$outputfile.$index.$endfile.$smb2;
   chomp $testpath;
   print ("$testpath \n");

   $id=fork();
   if($id eq 0)
        {
                exec ($testpath);
                wait();
                exit();
        }
 $index++;
}