[bug-libmatheval] "reverse alphanumerical" variables optional feature possible?

[Joey]

Hi,

I'm looking for a way to regard the reverse of alphanumericals as 
variables, e.g 3A.
I have a possible solution, wherein i precede string literals starting 
with a digit with an underscore character, but is there a more easy 
option here?

If not, this may be an optional feature?

Joey