cccc cccf cccp ccfc ccff ccoc ccpp ccpr ccrc ccrf ccrp ccrt cctc cctt cfcf cfco cffr cfor cfpo cfpr cfrp cfrt cftc cftr coco cocp coct cofc coff coft coof coop coot copo copp copr copt cor- corc corf coro corp corr cort cotc coto cott cpff cpft cprt cptp cptr crcc crcr crfc croc croo crop cror crot crpc crrt crtc crtf crtp ctcf ctcp ctfc ctfo ctor ctot ctpo ctpp ctrc ctrp fccf fccp fcot fcto ffcc ffff ffrr fftf foco fofo foof foot fopp for- foro forr fort foto fotp fott fp-c fpcc fpct fprf frcc frcp frfc frop frot ft-c ftfc ftop occc occt ocfp ocpp ocro ocrr oct- octo ofcr off- offc offo offr ofor oftp oocr ooff oooo oort ootp opo- opor oppo opto orco orff oro- orof oror orot orpc orro ortc orto otfc otfp oto- otof otoo otor otpp otro otto pccc pcfc pcpp pcrc pcrf pfff pffr pfft poco poff poof poop poor poot pop- popc popo popp popt porc poro porr port potc potf poto pott ppcc pppo pppp pprc pprf pptt prcc prcf prcp prfc pro- proc prof proo prop prot prtc prtp prtr ptcc ptop ptrf pttc rccc rcfc rcpo rcpt rctc rffc rftc rocc roco rofc roff rofo roof roop roor root ropo rorc roro rort rotc roto rotr rott rpfc rpof rrfc rrrr rtcc rtfc rttp tccc tcfc tcpo tctc tfot tfpt tftc tftp toco toff tofo toft toof toor toot top- topf topo topp topt torc torf toro torp torr tort totc toto totr tott tpcp tppp tppr tptp tptr trcc trfc trfr troc troo trop trot trpc trpp trtc trtr ttcp ttfc ttff ttop tttt