cccc cccp ccoc ccpp ccpr ccrc ccrp ccrt cctc cctt ckck ckco ckoc ckoo ckor ckot ckpc ckpr ckrc cock coco cocp coct cok- coko cook coop coot copo copp copr copt cor- corc cork coro corp corr cort cotc coto cott cprt cptp cptr crcc crcr crkc crkp croc crok croo crop cror crot crpc crrt crtc crtp ctcp ctor ctot ctpo ctpp ctrc ctrp kccc kcck kccr kcct kckc kckk kcko kckr kcor kcot kcpc kcpo kcpr kcpt kcrc kcro kcrp kcrr kcrt kctc kcto kkck kkco kkcr kkct kkkk kkoo kkor kkot kkpc kkpk kkpt kkrc kkrk kkro kkrr kkrt kktc kktk kock kocp koct kokc kokk koko kokp kokr kooc kook kooo koop koor koot kopp kopr kopt korc kork koro korr kort kotc kotk koto kotr kott kpcc kpcr kpkk kpkr kpoc kpok kpoo kpop kppc kppk kppo kppp kppr kprc kprk kpro kprp kprr kprt kpto kptr kptt krcc krco krkc krkk krko krkr kroc krok kroo krop kror krpr krpt krrc krrk krro krrr krrt krtc krtk krto krtr ktcc ktck ktco ktcr ktkc ktkk ktko ktkr ktkt ktoc ktok ktoo ktop ktor ktot ktpk ktpo ktpr ktpt ktrc ktrk ktro ktrp ktrr ktrt kttc kttk ktto kttp kttr kttt occc occt ocpp ocro ocrr oct- octo okko okok okor okot okpo okro okto oocr oooo oort ootp opo- opor oppo opto orco orko oro- orok oror orot orpc orro ortc orto oto- otok otoo otor otpp otro otto pccc pcpp pcrc pock poco poko pook poop poor poot pop- popc popo popp popt porc pork poro porr port potc poto pott ppcc pppo pppp pprc pptt prcc prcp pro- proc proo prop prot prtc prtp prtr ptcc ptop pttc pttk rccc rcpo rcpt rctc rocc rock roco rokk roko rokr rook roop roor root ropo rorc rork roro rort rotc rotk roto rotr rott rrrr rtcc rttp tccc tcpo tctc tock toco toko took toor toot top- topo topp topt torc tork toro torp torr tort totc toto totr tott tpck tpcp tppp tppr tptp tptr trcc troc troo trop trot trpc trpp trtc trtr ttcp ttop tttt