^[0-9] package name?

[BodBod]

Hello, I wasn't able to formulate a good keyword search for this question , so apologies if it's come up a million times before.

Given a&&b where:

a) package names should adopt a "reverse domain" standard e.g.
com.flashkit.utils
b) packages, classes in fact anything can't begin with a number.

What is the standard way to name a package originating from a domain with the lack of foresight to avoid beginning with a number. e.g.

com.4sightlacking.utils

Many thanks.