Creating a list of "weaved" sequential text

I want to be able to create a data structure like below:

{{A0, A1, A2, A3, A4},{B0, B1, B2, B3, B4}}

from two parameter inputs - number of sets (and converting them to sequential letters) and number of elements. I’m not quite sure how to work with the data structure and which methods to use (weaving?) to achieve this.

You mean something like this? (11.4 KB)

Thank you so much! This was very helpful. I don’t know why I didn’t think of concatenate.