Combinator Attack issue with rules

I came across hashcat and asked someone from the IRC about this and seems like I'm at an impasse.

I'm trying to test out a particular set of patterns in the following format
[word][4 digits][word][4 digits]

The word of course coming from a word list and the four digits going from 0 to 9

I tried the following 
hashcat64.exe -m 2500 -a 1 -j"?d ?d ?d ?d" -k"?d ?d ?d ?d" cap.hccapx six.dict six.dict
Only to come up with six.dict is empty when it isn't (i've checked everytime I ran it)

I realized that the -j and -k rules are for single characters only and can't do mask based input.

Any solution you guys can think off about this?

Thanks so much, hashcat's given my old crypto mining rig a new lease on life