Using "A" or "An" with letters

This entry is a potentially useful gift for you, my loyal readers. The spellings of the consonants and their etymologies are debatable, but the a/an information is accurate and helpful.

Letter		a/an
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z		an A a B a C a D an E an F a G an H an I a J a K an L an M an N an O a P a Q an R an S a T a U a V a W an X a Y a Z