Telephone numbers are always use grouping (432-23-43), which makes copying easier. People still have problems with software license codes, although those are grouped too.
However you can just imagine any grouping you like though, by using the power of thinking about stuff. It's a new process they just invented that, get this, lets you think about stuff. It isn't just restricted to thinking about stuff like groups of numbers however, but also works on things like duck identification and fluid dynamics, so it is very flexible.
They should teach that stuff in school. Thinking, that could be really transformative.
Been thinking along these lines, I've been wondering how to write a very short course for people who hate school on how to research and learn stuff.