Hi!
I took a vow never again to interfere with the ID of coins on the ID section (like many others, I'm a newbie and will be for many years to come).
Due to wear and other factors, N tends to look like H and O tends to look like A and more often P
on worn coins.
Take heart. I once solemnly presented a coin for ID with what I, from the vast pool of knowledge I had/have, helped out with the spot on ID of an ONNA on the left of a coin, and it was discretely pointed out to me that perhaps it might just possibly be ANNO and perhaps stamp collecting might actually be my true calling.
Hang in there, it will come with time and study.
Bruce Basemetal