Let's continue with the letters "C, D, and E."
Let's begin with the letters "A and B."
We continue the series with the letters "X and Z".
We continue the series with the letter "W".
We continue the series with the letters "T and V".
We continue the series with the letter "S".
We continue the series with the letter "R".
We continue the series with the letters "P and Q".
We continue the series with the letters "N and O".
We continue the series with the letter "M".