#!/usr/local/bin/perl
use strict;
use warnings;

my $string = "This is what you have";
print "$string\n";

substr($string, 5, 2) = "wasn't";
print "$string\n";

substr($string, -12) = "ondrous";
print "$string\n";

substr($string, 0, 1) = "";
print "$string\n";

substr($string, -10) = "";