Hi

Please take a note about the regular expressions here http://perldoc.perl.org/perlretut.html and do you want something like this?

use strict;
my $string = "Required Not_Required Not_Required Required";
while($string=~/\bRequired\b/gi){
    print "$&\n";##Here it will print only required text with non word
+ character before and after
}
[download]

Punitha