c-cd cccc cccf cccu ccdc ccdf ccdr ccfc ccfd ccff ccoc ccod ccrc ccrf ccuc cd-r cddr cfcf cfco cffr cfor coco cocu codd cofc coff cood coof cor- corc cord corf coro corr coud cour crcc crcr crdc crfc croc crod croo cror crud cucc cufc cuff cufo curd curf curo curr dccc dccu dcfc dddd ddoc ddrc dfcc dfco dfcu dfrf doco docu dod- dodd dodo doff dood doof door dorc dord dorf doro dorr doru douc doud douf dour drfc drod drof drou druu duco dudd dudo dudu dufc duff dufu duo- duro duru duur fccf fdoc ffcc ffff ffrr foco fofo food foof for- ford foro forr foud four frcc frfc frou fuc- fudd fufc fuff fufu fuor fur- furo furr occc ocro ocrr ocur oddd odoo odor odou odur ofcr ofdr off- offc offo offr offu ofor oocr ooff oooo oord orco ordo ordu orff orfu oro- orof oror orro oucc oudc oufc ouff our- ouro ouu- rccc rcdc rcfc rcrd rdoc rffc rocc roco rodd rodo rofc roff rofo rood roof roor rorc roro roru roud rouf rrfc rrrr rudd rudo rufc ruff rufo rurc rurd ruro ruru ruud ucdc ucdd ucrc udoo ufcu uocc uofo uor- urdu urff uro- uroo urur uuoc uuuu