#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11138205
use warnings;

open my $fh, '<', \<<END or die;
<t id=2bc>Only the...</t>
<t id=1>Only the...</t>
<t id=12>Only the...</t>
<t id=21>Only the...</t>
<t id=1>Only the...</t>
<t id=1a>Only the...</t>
<t id=2>Only the...</t>
<t id=2>Only the...</t>
<t id=2>Only the...</t>
<t id=2>Only the...</t>
<t id=3>Only the...</t>
<t id=35>Only the...</t>
<t id=31>Only the...</t>
<t id=2b>Only the...</t>
<t id=4>Only the...</t>
<t id=42>Only the...</t>
<t id=5>Only the...</t>
<t id=51>Only the...</t>
<t id=2ac>Only the...</t>
<t id=52>Only the...</t>
<t id=6>Only the...</t>
<t id=7>Only the...</t>
END

print sort {
  my ($anum, $achars, $bnum, $bchars) = map /<t id=(\d+)(\w*)>/, $a, $b;
  $achars cmp $bchars || $anum <=> $bnum
  } <$fh>;