I am interested in finding groups of words not that are all anagrams of each other, but rather which all share a common “letter bank,” which is a word (in the list) with no duplicate letters.
#!/usr/bin/perl
# http://perlmonks.org/?node_id=1202179
use strict;
use warnings;
chomp( my @words = <DATA> );
# find the "banks" in the word list
my %banks = map { $_, [ ] } grep !/(.).*\1/, @words;
# find what a word "banks" to and save if "bank" exists
for ( @words )
{
my $banksto = tr///csr;
exists $banks{$banksto} and push @{ $banks{$banksto} }, $_;
}
print "@$_\n" for values %banks;
__DATA__
ab
aabb
aaabbb
xxyy
xxxyyy
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