This is a followup of questions/2510755

What’s the best way to find the average of 2 strings with an added constraint that trailing space does not matter to the comparison (the way databases do a PAD SPACE comparison)?

The answer in questions/2510755 works great but can lead to trailing space at the end. I am trying to find average of strings with a constraint that trialing space does not matter to the comparison.

This essentially means that the zeroth position has a radix of one less than the rest and may be I could use a concept of mix radix (like hours and minutes) to find average but I am not entirely sure if that’s the right thing to do.