WHAT'S LAST?

Credit: Mike Coppola in "Ask Marilyn"

Parade Magazine

What is the last item in this series?

J8 - F8 - M5 - A5 - M3 - J4 - J4 - A6 - S9 - O7 - N8 - ??

HINT:

I didn't say "next" item.

Answer:

D8 .......... The series comprises the first letter of each month of the year and the number of letters in the month's name.