I need to number rows from 1 to whatever, then change SOME of the numbers to
letters without continuing the numbers in order. So I first need to number
100 rows 1 through 100. Then I may need to change some of those numbers to
letters. Rows would look like 1, 2, 3, 4......up to 100. Then I may need to
change 20 through 25 to A, B, C, D, E with the next rows labled 26 on to 100.