I am trying to do a programming problem in python,

they give two numbers and you need to count how many numbers inbetween the two given have 6 or 8 in them.

My solution is to loop over each of the numbers and convert the number to a string, then check if they have 6 or eight exclusively.

It works for small numbers but not for the 52bit number they give:
92871036442 and 3363728910382456

I will post my code below that can be dropped into a notebook python 3

any ideas would be nice

https://www.codepile.net/pile/b361jnMl