PrinceProcessor

I have an older WPA2 hccap file with a known xkcd-style password. For sake of discussion, let's say password is barnrabbitstampfork. If I manually create .txt file with said password and run -a 0, cudaHashcat64.bin finds it fine.  

If I create a dictionary file with only:

barn
rabbit
stamp
fork

#./pp64.bin < dictionary.txt | grep ^barnrabbit
barnrabbit
barnrabbitbarn
barnrabbitfork
barnrabbitstamp
barnrabbitrabbit

It doesn't generate the barnrabbitstampfork combination.  I'm missing something, but don't know what.  Is there a length limitation?