Combination attack and rules how?

[miccee]

Use combinator.exe for wordlists for "Hello" and "world", output to "combined-wordlist"

Use mp64.exe https://hashcat.net/wiki/doku.php?id=maskprocessor for $?d $?d $?d, output to "3d.rule"

Then use -a 0 combined-wordlist -r 3d.rule.

You can pipe or use .exe (to create an output file) for windows https://github.com/hashcat/hashcat-utils/releases/