If you are generating the lists, you can also use some type of combination module such as Math::Combinatorics. 
use Math::Combinatorics;
my @aminoacids = qw(Tyrosine Glycine Leucine); 
print join("\n", map { join " ", @$_ } permute(@aminoacids)),"\n";

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In reply to Re: help with hashes by artist
in thread help with hashes by Anonymous Monk

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