I have a question and hope someone can help:

Col A
AA, AB, AC, BB, DDD
AC, DDD
CD, GH, DDD

I want to create a formula in another column where if each row has

AA or AB, show "Class 1"
DDD show "Class 2"
AC or CD or GH show "Class 3"
BB show class "4"

Please help. Thank you.