Syntax for computer name mask in policy

Yes, I do see a previous post on this topic but it did not answer the question.

In ERAS, when creating a policy rule, what is the syntax for computer name mask?

The answer I found on this forum was "typical wildcard syntax" which is meaningless, if you think about it. (Wildcards can be anything, depending on the system in use, y'know?)

All of my laptop computers follow a naming convention like xxxxLxx where the 'x' is a digit between 0 and 9 and I want to differentiate them automatically when they are added to ERAS and have a policy applied to them.

Thanks,
JJJ