Well, when we take the RNA sequence, the RNA molecule, and place it into our ribosome of the cell, the ribosome reads the codons without actually overlapping those codons. So what exactly do we mean by that? Well, let's take a look at these two examples. In this particular case, as the ribosome reads our codons, there is overlap between the codons. But in this case there is no overlap. And it turns out that this is how the ribosome actually reads that sequence of nucleotides.