See perlintro. The following is almost entirely copied from that page, I've just added the chomp to remove the newlines and customized the print:

#!/usr/bin/env perl
use strict;
use warnings;
open(my $in, "<", "input.txt") or die "Can't open input.txt: $!";
chomp( my @lines = <$in> );
close $in or die "$in: $!";
print "Line 1: $lines[0]\n";
print "Line 2: $lines[1]\n";
[download]