And since there are only 20 different amino acids that exist in nature, that implies that many of the three letter codons correspond to the same exact amino acid. And this phenomenon, the fact that two or more different codons can correspond to the same exact amino acid, makes our genetic code redundant or degenerate. So, basically, if we look at the following diagram, it describes what we just mentioned. So if we take our genetic code, we see that the sequence CC, you or cytosine cytosine yourself, and the sequence Cytosine cytosine cytosine or CCC, these two different sequences, both correspond to the same exact amino acid. They correspond to our amino acid proline. Now, I haven't actually listed all the codons that are found in the genetic code, but if you want to, you can look up our genetic code online or in a textbook.