This works. Give it a try:

#!/usr/bin/perl

use strict;
use warnings;
use CPAN;

CPAN::Shell->install(

"Bundle::LWP",
"Bundle::CPAN",
"HTTP::Headers",
"HTTP::Cookies", 
"HTTP::Request::Common",
"Crypt::SSLeay",        
"Mail::Webmail::Gmail",
"GMail::IMAPD",
"Module::Install",
"Data::Alias",
"Class::Accessor::Fast",
"Config::Any",
"Net::Twitter",
"Term::Shell",
"Twitter::Shell");
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