c-cd cccc cccf cccu ccdc ccdf ccdr ccfc ccfd ccff ccoc ccod ccrc ccrf ccrt cctc cctt ccuc ccut cd-r cddr cdot cfcf cfco cffr cfor cfrt cftc cftr coco coct cocu codd cofc coff coft cood coof coot cor- corc cord corf coro corr cort cotc coto cott cotu coud cour cout crcc crcr crdc crfc croc crod croo cror crot crrt crtc crtf crud crut ctcf ctfc ctfo ctor ctot ctrc cucc cufc cuff cufo curd curf curo curr curt cut- cutc cuto cutt dccc dcct dccu dcfc dctc dddd ddoc ddot ddrc dfcc dfco dfcu dfdt dfrf dftr doco doct docu dod- dodd dodo doff dood doof door doot dorc dord dorf doro dorr dort doru dotd doto dott douc doud douf dour dout drfc drod drof drot drou drut druu dtcc dtfc dtor dtot duco duct dudd dudo dudu dufc duff dufu duo- duro durt duru duur duut fccf fcot fcto fdoc fdot fdtc ffcc ffff ffrr fftf foco fofo food foof foot for- ford foro forr fort foto fott foud four fout frcc frfc frot frou ft-c ftcd ftfc ftuc fuc- fuct fudd fufc fuff fufu fuor fur- furo furr furt futo futu occc occt ocro ocrr oct- octo ocur oddd odoo odor odot odou odtu odur ofcr ofdr off- offc offo offr offu ofor oocr ooff oooo oord oort orco ordo ordu orff orfu oro- orof oror orot orro ortc orto otcd otfc oto- otof otoo otor otro otto ottu otur oucc oudc oufc ouff our- ouro ourt out- outo ouu- rccc rcdc rcfc rcrd rctc rdoc rffc rftc rocc roco rodd rodo rofc roff rofo rood roof roor root rorc roro rort roru rotc roto rotr rott roud rouf rout rrfc rrrr rtcc rtdt rtfc ruct rudd rudo rufc ruff rufo ruft rurc rurd ruro ruru ruto rutt rutu ruud tccc tccu tcdd tcfc tctc tdff tdor tfcu tfdc tfot tftc toco todd todo todt todu toff tofo toft tofu tood toof toor toot torc tord torf toro torr tort toru totc totd toto totr tott tour tout trcc trfc trfd trfr troc trod troo trot trou trtc trtr truc trud trut truu ttfc ttff tttt tucc tuco tudu tufc tuff tufo tuft tufu tuor turc turd turf turo turr turt turu tuto tutt tutu tuuo ucdc ucdd ucrc ucut udoo udot ufcu uocc uofo uor- urdu urff urft uro- uroo urur urut utfo utor utto uttu uuoc uutf uuuu