cccc cccf cccu ccfc ccff ccoc ccrc ccrf ccrt cctc cctt ccuc ccut cfcf cfco cffr cfor cfrt cftc cftr coco coct cocu cofc coff coft coof coot cor- corc corf coro corr cort cotc coto cott cotu cour cout crcc crcr crfc croc croo cror crot crrt crtc crtf crut ctcf ctfc ctfo ctor ctot ctrc cucc cufc cuff cufo curf curo curr curt cut- cutc cuto cutt fccf fcot fcto ffcc ffff ffrr fftf foco fofo foof foot for- foro forr fort foto fott four fout frcc frfc frot frou ft-c ftfc ftuc fuc- fuct fufc fuff fufu fuor fur- furo furr furt futo futu occc occt ocro ocrr oct- octo ocur ofcr off- offc offo offr offu ofor oocr ooff oooo oort orco orff orfu oro- orof oror orot orro ortc orto otfc oto- otof otoo otor otro otto ottu otur oucc oufc ouff our- ouro ourt out- outo ouu- rccc rcfc rctc rffc rftc rocc roco rofc roff rofo roof roor root rorc roro rort roru rotc roto rotr rott rouf rout rrfc rrrr rtcc rtfc ruct rufc ruff rufo ruft rurc ruro ruru ruto rutt rutu tccc tccu tcfc tctc tfcu tfot tftc toco toff tofo toft tofu toof toor toot torc torf toro torr tort toru totc toto totr tott tour tout trcc trfc trfr troc troo trot trou trtc trtr truc trut truu ttfc ttff tttt tucc tuco tufc tuff tufo tuft tufu tuor turc turf turo turr turt turu tuto tutt tutu tuuo ucrc ucut ufcu uocc uofo uor- urff urft uro- uroo urur urut utfo utor utto uttu uuoc uutf uuuu