Can you do automatic fixed length number with a Prefix that is Alphanumeric on Enterprise Contracts?

Summary:

Our client would like to have a fixed length number with an automatic Prefix that is Alphanumeric.

Content (please ensure you mask any confidential information):

For example, Prefix is F20 (manually incremented every year) - and the number is five digits starting at 10000. So the first Contract would be F20-10000 and the next would be F20-10001, etc...

Version (include the version you are using, if applicable):

Oracle Classic Screen

Code Snippet (add any code snippets that support your topic, if applicable):