* B 0 (B is the 2nd letter, 0 is the 2nd number)

* C 2 (C is the 3rd letter, 2 is the 3rd number)

* D E 3 (D is the 4th letter, E is the 5th letter, 3 is the 4th number)

* F G (F is the 6th letter, G is the 7th letter)

Therefore, the next part of the sequence should be:

- 4

This is because the sequence alternates between letters and numbers, and we're now due for a number. The next number in the pattern would be 4.