How to split an attribute using regular expression

There could be a simple solution but I go with StringSearcher with regex ^[A-Z]*[0-9]* or something like that.

Then you could replace the found string with the original if you want an attribute with just the A and the B in an AttributeCreator.

In the StringReplacer you can use the regular expression 

\D$

(all characters at the end of the attribute that are not numbers), and replace this with nothing.

I'd use the string searcher with the following REGEX

([a-zA-Z]{1,2}\d)

[a-zA-Z]{1,2} matches one or two characters (A-Z case insensitive)

\d matches one digit

(...) groups everything together

https://rubular.com/r/h9ItOkxPbyldAZ