Possible development to support three wordlists at once?

[vigilantbag]

There is no hashcat-native way of doing combinator3 with rules. A simple solution would be creating an intermediate wordlist with a space appended to each line, then creating a second intermediate wordlist containing the result of combining the first intermediate one with itself (as said before, with a 13mb wordlist this is infeasible) and then using the second one in a normal combination attack with the original one.

Alright, I understand what you are talking about. May you supply me reference code that I can wrap my head around for that?