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#!/opt/perl/bin/perl
use 5.032;
use strict;
use warnings;
no warnings 'syntax';
use experimental 'signatures';
use experimental 'lexical_subs';
while (<>) {
my %anagrams;
#
# Iterate over the words. We're assuming all the words are on
# a single line, and the words don't contain a double quote.
# (If we can't assume this, we could use a CSV parser instead).
#
foreach my $word (/"([^"]+)"/g) {
#
# Normalize each word: split into characters, sort them, join them.
# Note that we're splitting on characters, not graphemes, nor
# do we normalize the input. This may lead to unexpected results
# when using accented letters and/or combining characters. But
# that's what you get when using poor specifications.
#
my $normalized = join "" => sort split // => $word;
push @{$anagrams {$normalized}} => $word;
}
#
# Print them. We make this deterministic, so we can easily write tests
#
foreach my $key (sort keys %anagrams) {
say join ", " => map {qq {"$_"}} @{$anagrams {$key}};
}
}
__END__
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