How to apply rules to combinator attack?

[Kgx Pnqvhm]

I somehow thought there couldn't be two dictionaries used at once by 'plus.

So the -j u would apply to dict1 and the -k u to dict2?

(This is like the original oclHashcat, which was backported into 'plus, I see(?) But the tutorials from back then also had the stdout/debug modes where the output could be inspected.)