Hi,
Need help to write some Regular expressions.

Input string  07CRo.456778 (the length after digit wil be varying example 07CRo.23, 07CRo.xcv4445efefe)
Expected  456778 (need the string after the decimals) 
I want to get last n digits in the given number…
123456789 (last 6 digits of the number  456789)
the lengt of the number will be varying
Thanks
Sunny