Autogeneration issue in ABAP----urgent please.

I want to do the Auto generation technique.

Like I have role code - RC001.

Max value i have RC007.

I need this value to be autogenerated that automatically it wil be RC008.

For this I have used SPLIT RC and 007 separate but when i add 007 its giving 8 as a output not 008.

I need ouput as RC008.

Please help me.

Regards

Deepanker