This does all twelve stanzas of London Bridge. Also, it passes the defaults for

perlcritic -harsh
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. Enjoy. (Update: removed a line that toolic noticed was never used.)

#!/usr/bin/perl

use strict;
use warnings;

my @armed_guard       = ("watch all night", "fall asleep",            
+"smoke all night");
my @royal_decree      = ("Set a man to", "Suppose the man should", "Gi
+ve him a pipe to");

my @building_outcome  = ("falling down",  "wash away", "will not stay"
+,     "bend and bow",  "stolen away");
my @building_material = ("London Bridge", "wood and clay","bricks and 
+mortar", "iron and steel","silver and gold");
my @phrase_glue       = ("is",            "will",          "",        
+          "will",          "will be");
my $fair_lady =          "My fair Lady.\n\n";

# First stanza
print join(" ",$building_material[0],$phrase_glue[0],$building_outcome
+[0]). ",\n";
print $building_outcome[0] . ", " . $building_outcome[0] . ",\n";
print join(" ",$building_material[0],$phrase_glue[0],$building_outcome
+[0]). ",\n";
print $fair_lady;

# middle 8 stanzas
for my $i (1..$#building_outcome) {
        print "Build it up with ".$building_material[$i].",\n";
        print $building_material[$i] . ", " . $building_material[$i] .
+ ",\n";
        print "Build it up with ".$building_material[$i].",\n";
        print $fair_lady;

        print join(" ",ucfirst($building_material[$i]),$phrase_glue[$i
+],$building_outcome[$i]).",\n";
        print $building_outcome[$i] . ", " . $building_outcome[$i] . "
+,\n";
        print join(" ",ucfirst($building_material[$i]),$phrase_glue[$i
+],$building_outcome[$i]).",\n";
        print $fair_lady;
        }

# final 3 stanzas
for my $i (0..2) {
        print join(" ", $royal_decree[$i], $armed_guard[$i]).",\n";
        print $armed_guard[$i].", ".$armed_guard[$i].",\n";
        print join(" ", $royal_decree[$i], $armed_guard[$i]).",\n";
        print $fair_lady;
}
exit 0;
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