Excel Formula to extract last digits from text string

Hello,

I am looking for an excel formula to extract the last digits from a text string.

Example: RAC-170422242-OFFMAX105
I would need to extract 105 from that string.

It's not always the last 3 characters that i need. Sometimes the string can look like this:

RADF-36564-WAL24

In this case I need to extract 24 from that string

Any help would be much appreciated.

Thanks