cccc cccu ccnc ccnr ccnu ccoc ccrc ccrt cctc cctt ccuc ccut cnco cnrc cnrr cnrt cntc cntr cnut coco coct cocu con- conc conn cono cont coon coot cor- corc corn coro corr cort cotc cotn coto cott cotu coun cour cout crcc crcr croc cron croo cror crot crrt crtc crun crut ctor ctot ctrc ctrn cttn cucc cucn cuno cunt cuon curn curo curr curt cut- cutc cuto cutt nccc nccn nccr ncct nccu ncnc ncoc ncor ncrc nctc nctr nnnn nnot nntn noco noct non- nonn nono nont nonu noo- noon nooo noor noot nor- norc norn noro norr nort not- noto nott noun nour nout nroc nron nrrc ntcc ntnu ntrc ntru ntto nttr ntuc nucu nunc nunn nuno nunt nuoc nuon nurc nurn nurr nurt nuru nutt nutu occc occn occt ocon ocro ocrr oct- octo ocur onc- onco onct onno onon onor ont- ontc onto onur onut oocr oont oooo oort orco ornc orno oro- oron oror orot orro ortc orto oto- oton otoo otor otro otto ottu otur oucc oun- our- ourn ouro ourt out- outo ouu- rccc rcnr rcon rctc rnco rnnt rnot rnut rocc roco ronc rono ront roon roor root rorc roro rort roru rotc rotn roto rotr rott roun rout rrrr rrun rtcc ruct runc runn runo runt rurc ruro ruru ruto rutt rutu ruun tccc tccu tcnn tcon tctc tncc tnut toco tonn tono tonu toon toor toot torc torn toro torr tort toru totc toto totr tott toun tour tout trcc trno troc tron troo trot trou trtc trtr truc trun trut truu ttcn tton tttt tucc tuco tunc tunn tuno tunu tuor turc turn turo turr turt turu tuto tutt tutu tuuo ucon ucrc ucut uncc unco unct unno unon unro unto unut uocc uor- uro- uroo urun urur urut utor utto uttu uuno uuoc uuuu