Best way to combine 4+ Wordlists

[gentl]

Hello,  for example i have 4 wordlist
1) Sam, sAm, SAM etc..   
2) Freman, fReman, FREMAN etc..
3) 1971, 01011971, 01-01-71 etc...
4) BigDaddy, bigDaddy, BIGdaddy etc..

I need to make all possible combinations , In combo shoud use only 1 word from each wordlist, like:
1+2, 1+3, 1+4,  2+1, 2+3 etc.
1+2+3, 1+2+4, 1+3+4, 2+3+4, 2+4+3 etc.
1+2+3+4, 2+1+3+4, 1+3+4+2 etc.

What the best way ? 
I see only 2 ways
1) Use Combinator  and handly combine each combination... -  rather hard work 
2) Use princeprocessor   - it will produce many useless combos like SamSamSamSam , SamsAmSAMsam etc.

Tell me pls if u have more ideas , thanks!

[gentl]

Just played with PRINCE...
Ye it has amazing speed - building 4gb wordlist with a seconds.
But in my task case wordlist will be 500+ gb just because of useless combos