The "A" says "ah"

While I was trying to do my school, I heard this little "conversation" between Dare Devil and Ironman. 

Dare Devil: The "B" says "duh", the "B" says "duh" -

Ironman: No, no! It's the "B" says "buh"!

Dare Devil: The "B" says "puh", the "B" says "puh" -

Ironman: NO! Buh! Not puh!

Dare Devil (exasperated): The "B" says nothing, the "B" says nothing, every letter makes a sound the "B" says nothing! :P