What are the vowels sounds?

The letter I can be pronounced as y(like in Pit) or I (as in when you announce yourself)
The letter E sounds like eh (like in ten) or with duplicate (EE) could be like been.
The letter A sounds like ai (like in cake) or ah (like in car)
The letter O sounds like O (like in orange) or ohr (like in mortified) or owh (like in joke)
The letter U sounds like you (like in useless) or uh (like in under)

The sounds of vowels can vary over different accents, as it's the vowels that create different accents. I hope this helped you anyways.