Smarter way to do a combinator attack with different rules for -j/-k?

[voideater]

Think I managed to figure out it. Solution is to use combinator and pipe the result to hashcat instead of saving it to a file, as suggested by atom in https://hashcat.net/forum/thread-5813-post-31181.html . This way I can use the rule that tries all four-digit combinations as well, although it's probably a complete overkill and waste of time.