How to split at specified delimiter

[Gribouillis]

Or you could use regex, which i am horrible at.

Regex is not difficult to learn and it is very powerful for some tasks

>>> import re
>>> regex = re.compile(
... r"\d*" # zero or more digits
... r"E"   # the letter E
... r"\d*" # again zero or more digits
... )
>>> match = regex.search('VA004L200E2T99')
>>> match.group()
'200E2'