cccc cccf ccfc ccff ccnc ccnf ccnr ccoc ccrc ccrf ccrt cctc cctt cfcf cfcn cfco cffr cfnr cfor cfrn cfrt cftc cftr cnco cnrc cnrr cnrt cntc cntf cntr coco coct cofc coff coft con- conc conf conn cono cont coof coon coot cor- corc corf corn coro corr cort cotc cotn coto cott crcc crcr crfc croc cron croo cror crot crrt crtc crtf ctcf ctfc ctfo ctor ctot ctrc ctrn cttn fccf fcot fcto ffcc ffff ffrr fftf foco fofo fono font foof foon foot for- forn foro forr fort foto fott frcc frcn frfc fron frot ft-c ftfc nccc nccf nccn nccr ncct ncfc ncnc ncoc ncor ncrc nctc nctr nfct nfff nfon nftc nfto nnnn nnot nntn noco noct non- nonn nono nont noo- noon nooo noor noot nor- norc norf norn noro norr nort not- noto nott nrfc nroc nron nrrc ntcc ntfc ntof ntrc ntto nttr occc occn occt ocon ocro ocrr oct- octo ofcr off- offc offo offr ofno ofor onc- oncf onco onct onno onon onor ont- ontc onto oocr ooff oont oooo oort orco orff ornc orno oro- orof oron oror orot orro ortc orto otfc oto- otof oton otoo otor otro otto rccc rcfc rcnr rcon rctc rffc rftc rnco rnnt rnot rocc roco rofc roff rofo ronc rono ront roof roon roor root rorc roro rort rotc rotn roto rotr rott rrfc rrrr rtcc rtfc tccc tcfc tcnn tcon tctc tfot tftc tncc tnfc toco toff tofo toft tonn tono toof toon toor toot torc torf torn toro torr tort totc toto totr tott trcc trfc trfr trno troc tron troo trot trtc trtr ttcn ttfc ttff ttfn tton tttt