#!/usr/bin/env perl
use strict;
use warnings;
use 5.014;

my $string;
my $pattern;

while ( ( say "Input template string:" ) && ( $string = <> ) ) {
    while ( ( say "Input pattern:" ) && ( $pattern = <STDIN> ) ) {
        chomp $pattern;
		my $regex = qr/$pattern/p;
		$string =~ $regex;
        say "${^PREMATCH} \x{25a0}\x{25a0}${^MATCH}\x{25a0}\x{25a0} ${^POSTMATCH}";
    }
}