Regex find string then return 10 character after it

[pyStund]

Hi,
I’ve been looking at Regex and regex cheat sheets and can find how to search for a string and then group them but it would be useful for me to be able to set a number of variables.

For example

varX = “x: “
varY = “y: “
varZ = “z: “

And then to specify for regex Python that I want to return the next 10 following characters.

Can someone point me to the terms to search for syntax in manuals to read

Thanks for your help