#!/usr/bin/perl -w 
use strict;  
use warnings;
my $folder='FileMuxInternaldefs';
my $mk='./AACBaseFileLib/common.mk:  $(PROJECT_ROOT)/../FilemuxInternalDef';
      if ($folder =~ /$mk/i) #this match failing for the give input
                {
                      print "\nIN\n";
                                  if ($folder !~ /$mk/m)
                                 {
                                    print "CASE-SENSITIVE:$mk\n";
                        
                                 }
                }