c-cd cccc cccp ccdc ccdp ccdr ccoc ccod ccpp ccpr ccrc ccrp ccrt cctc cctt cd-r cddr cdot ckck ckco ckdo ckoc ckoo ckor ckot ckpc ckpr ckrc ckrd cock coco cocp coct codd cok- coko cood cook coop coot copd copo copp copr copt cor- corc cord cork coro corp corr cort cotc coto cott cppd cprt cptp cptr crcc crcr crdc crkc crkp croc crod crok croo crop cror crot crpc crrt crtc crtp ctcp ctor ctot ctpo ctpp ctrc ctrp dccc dccp dcct dcop dcpo dcrk dctc dddd ddoc ddot ddpo ddrc dkdc dock doco doct dod- dodd dodo doko dood dook doop door doot dopo dopp dopr dopt dorc dord dork doro dorp dorr dort dotd dotk doto dott dpcp dpdt dppc dprk drod drop drot dtcc dtdp dtor dtot dttp kccc kccd kcck kccr kcct kcdc kcdd kcdr kckc kckk kcko kckr kcor kcot kcpc kcpo kcpr kcpt kcrc kcro kcrp kcrr kcrt kctc kcto kdcc kdcd kdco kdcr kddc kddd kddk kddr kdkd kdkk kdko kdkr kdkt kdoc kdok kdot kdpr kdro kdtd kdtp kdtr kkcd kkck kkco kkcr kkct kkdc kkdd kkdo kkdt kkkk kkoo kkor kkot kkpc kkpk kkpt kkrc kkrk kkro kkrr kkrt kktc kktk kocd kock kocp koct kodk kodo kodt kokc kokk koko kokp kokr kooc kook kooo koop koor koot kopp kopr kopt korc kord kork koro korr kort kotc kotd kotk koto kotr kott kpcc kpcr kpdc kpdo kpdr kpkk kpkr kpoc kpod kpok kpoo kpop kppc kppd kppk kppo kppp kppr kprc kprd kprk kpro kprp kprr kprt kptd kpto kptr kptt krcc krcd krco krdc krdd krdo krdr krkc krkd krkk krko krkr kroc krod krok kroo krop kror krpr krpt krrc krrk krro krrr krrt krtc krtk krto krtr ktcc ktck ktco ktcr ktdc ktdd ktdk ktdo ktdr 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 ocpd ocpp ocro ocrr oct- octo oddd odoo odop odor odot odrp okko okok okor okot okpo okro okto oocr oooo oord oort ootp opo- opor oppo opto orco ordo orko oro- orok oror orot orpc orro ortc orto otcd oto- otok otoo otor otpp otro otto pccc pcod pcpp pcrc pcrd pdcp pdoc pdpr pdrc pdtc pocd pock poco pod- podd podo poko pood pook poop poor poot pop- popc popo popp popt porc pork poro porr port potc potd poto pott ppcc ppcd ppdk ppod pppd pppo pppp pprc pptt prcc prcd prcp pro- proc prod proo prop prot prpd prrd prtc prtp prtr ptcc ptdc ptop ptpd ptrd pttc pttk rccc rcdc rcpd rcpo rcpt rcrd rctc rdoc rdpc rocc rock roco rodd rodo rokk roko rokr rood rook roop roor root ropo rorc rork roro rort rotc rotk roto rotr rott rpdp rptd rrrr rtcc rtdt rttp tccc tcdd tcpo tctc tdkp tdkr tdor tkod tock toco todd todo todt toko tood took toor toot top- topd topo topp topt torc tord tork toro torp torr tort totc totd toto totr tott tpcd tpck tpcp tppd tppp tppr tptp tptr trcc troc trod troo trop trot trpc trpp trtc trtr ttcp ttop tttt