#!/usr/bin/perl -l

use strict;
use warnings;
use Text::Trim;

$|=1;

my @strings= <<"EOF";
This is a sentence in a paragraph. This a sentence in a paragraph.
 This is a sentence in a paragraph.

 This is a sentence in a paragraph. This a sentence in a paragraph.
 This is a sentence in a paragraph.
EOF

my $trimmed = trim(@strings);
print "\"$trimmed\"";