OK, let's get rid of that big hash, if you think that's where the trouble is:
WORD: while (<DATA>) {
chomp;
my $key = lc $_;
my $signature = join "", sort split //, $key;
my $list = $words{$signature} ||= [];
lc $_ eq $key and next WORD for @$list;
push @$list, $_;
}
for (sort keys %words) {
my @list = sort @{$words{$_}};
next unless @list > 1;
print "@list\n";
}
__END__
Abby
abbot
acne
alert
alter
baby
Baby
BABY
best
bets
cane
later
Unix
UNIX
How's that do?
-- Randal L. Schwartz, Perl hacker
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