alphabet a or an in front of letters.

Hi

I wonder if anyone can confirm if I have the use of A and AN correct in this sequence. I wrote down the sound I think each letter starts with. If it makes any difference I am a English speaker from New Zealand.

Thanks



a b
a b
a c
a d
an e
an f (starts with e sound)
a g
an h (a sound)
an i
a j
a k
an l (e)
an m (e)
an n (e)
an o
a p
a q
an r (a)
an s (e)
a t
a u (y)
a v
a w
an x (e)
a y
a z