cccc cccp cccv ccoc ccpp ccpr ccrc ccrp ccrt cctc cctt cctv ccvo coco cocp coct coop coot copo copp copr copt cor- corc coro corp corr cort cotc coto cott covo cprt cptp cptr cpvc cpvt crcc crcr croc croo crop cror crot crpc crrt crtc crtp crtv ctcp ctor ctot ctpo ctpp ctrc ctrp ctvo ctvt cvcc cvrr occc occt ocpp ocro ocrr oct- octo oocr oooo oort ootp opo- opor oppo opto orco oro- oror orot orpc orro ortc orto orvr oto- otoo otor otov otpp otro otto ovo- ovoo ovot ovpp pccc pcpp pcrc pctv poco poop poor poot pop- popc popo popp popt porc poro porr port potc poto pott povo ppcc pppo pppp pprc pptt pptv prcc prcp pro- proc proo prop prot prov prtc prtp prtr ptcc ptop pttc pvco rccc rcpo rcpt rctc rctv rcvr rocc roco roop roor root ropo rorc roro rort rotc roto rotr rott rovo rrrr rtcc rttp rv-c tccc tcov tcpo tctc toco toor toot top- topo topp topt topv torc toro torp torr tort torv totc toto totr tott tovo tpcp tppp tppr tptp tptr trcc troc troo trop trot trpc trpp trpv trtc trtr ttcp ttop tttt tvro tvrr tvtv vooc voor voot vopt vor- voro vort voto votp vpro vroc vrot vrto vtpr vvvv