c-cd cccc ccdc ccdr ccoc ccod ccrc ccrt cctc cctt cd-r cddr cdot ckck ckco ckdo ckoc ckoo ckor ckot ckrc ckrd cock coco coct codd cok- coko cood cook coot cor- corc cord cork coro corr cort cotc coto cott crcc crcr crdc crkc croc crod crok croo cror crot crrt crtc ctor ctot ctrc dccc dcct dcrk dctc dddd ddoc ddot ddrc dkdc dock doco doct dod- dodd dodo doko dood dook door doot dorc dord dork doro dorr dort dotd dotk doto dott drod drot dtcc dtor dtot kccc kccd kcck kccr kcct kcdc kcdd kcdr kckc kckk kcko kckr kcor kcot kcrc kcro kcrr kcrt kctc kcto kdcc kdcd kdco kdcr kddc kddd kddk kddr kdkd kdkk kdko kdkr kdkt kdoc kdok kdot kdro kdtd kdtr kkcd kkck kkco kkcr kkct kkdc kkdd kkdo kkdt kkkk kkoo kkor kkot kkrc kkrk kkro kkrr kkrt kktc kktk kocd kock koct kodk kodo kodt kokc kokk koko kokr kooc kook kooo koor koot korc kord kork koro korr kort kotc kotd kotk koto kotr kott krcc krcd krco krdc krdd krdo krdr krkc krkd krkk krko krkr kroc krod krok kroo kror 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 ktor ktot ktrc ktrk ktro ktrr ktrt kttc kttk ktto kttr kttt occc occt ocro ocrr oct- octo oddd odoo odor odot okko okok okor okot okro okto oocr oooo oord oort orco ordo orko oro- orok oror orot orro ortc orto otcd oto- otok otoo otor otro otto rccc rcdc rcrd rctc rdoc rocc rock roco rodd rodo rokk roko rokr rood rook roor root rorc rork roro rort rotc rotk roto rotr rott rrrr rtcc rtdt tccc tcdd tctc tdkr tdor tkod tock toco todd todo todt toko tood took toor toot torc tord tork toro torr tort totc totd toto totr tott trcc troc trod troo trot trtc trtr tttt