Hey,

I want to create a list of letters, starting at AA1 to ZZ15.

IE,

AA1, AA2, AA3, AA4, AA5, AA6, AA7, AA8, AA9, AA10, AA11, AA12, AA13, AA14, AA15, AB1, AB2 etc etc.

I am familiar with loop processes but can't get my head around the logic to this one.

Help appreciated. Thanks.