So a codon, and this is basically used to correspond to those amino acids. Now we have four times four times four gives us 64 possibilities. So there are 64 unique possibilities for our codon, and that's way more than the number of amino acids. We have 20 amino acids and 64 codons. And what that basically means is we have these codons that are different but can correspond to the same exact amino acid. And that's exactly what we need by the code being degenerative.