Looking for a quick and easy way to trim a token in quick fields.

We have a barcode zone, that when scanned starts with '9999', followed by a invoice number.

I would like to TRIM or remove the 9999 from the token, leaving only the invoice number.

Example:

Barcode scans as:   9999B12345

I would like to remove the 9999 leaving the token or a new token with the value B12345

Would like to do in Quick Fields.

Any quick ideas?

Jeff