Kinda too early to tell, as you didn't say if or how long they have been on 12/12, but from the way your talking, you may have two females and two males...keep watching them green stems for balls....red stems sometimes indicate females, and they may be smaller...green stems may indicate males, and they may grow a little faster than the females, but wait until YOU are sure...and read up on sexing plants...there's lots of info on it here somewhere. Good luck!