#!/usr/bin/perl
use strict;
use warnings;
use feature 'say';

my @trimers = <>;
chomp @trimers;
say for glob +('{' . join(',', @trimers) . '}' ) x 2;

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Update: Using glob is safe only if the data do not contain any special characters like ? * [] {} , or whitespace.
لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: Hexamer combination from 3mers. by choroba
in thread Hexamer combination from 3mers. by oxydeepu

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