How can I set a variable to be the last alphabetical letter found in a text string?

For example, if TS1='$35gh6', how would i be able to make an output display 'h', since it is the last alphabetical letter found in the text string. This is assuming I didnt know what was in the text string. I need to just find the last letter and display it no matter what the text string i.

Answer 1

[Star Strider]

Use regexp:

TS1='$35gh6';
LastLetter = TS1(max(regexp(TS1, '[A-Za-z]')))