#!/usr/bin/perl

# Always use these
use strict;
use warnings;

# Edit contains the complete path of the files to be edited
my $path = "/home/rjs/heena/edit" ;

# Getting a file handler (and test for success/failure!)
open(FL, "<", $path) or die "unable to open data file '$path' ($!)\n";

# Getting all the file names in the @array so that i can process the
# file one by one
chomp(my @array = <FL>);

# Close the data file
close(FL);

# Process each file
foreach my $file (@array) {
    next if ($file =~ /^\s*$/);   # Skip blank lines from datafile
    open(FILE, "<", $file) or die "unable to open file '$file' ($!)\n";
    while(<FILE>) {
        s/CONFIDENTIAL(.*?)own\s+risk/ /sm;
        print;
    }
    close(FILE);
}