cccc ccnc ccnr ccoc ccrc ccrt cctc cctt ckck ckco cknc cknt ckoc ckoo ckor ckot ckrc cnco cnrc cnrr cnrt cntc cntk cntr cock coco coct cok- coko con- conc conk conn cono cont cook coon coot cor- corc cork corn coro corr cort cotc cotn coto cott crcc crcr crkc croc crok cron croo cror crot crrt crtc ctor ctot ctrc ctrn cttn kccc kcck kccr kcct kckc kckk kckn kcko kckr kcno kcnr kcnt kcon kcor kcot kcrc kcrn kcro kcrr kcrt kctc kctn kcto kkck kkcn kkco kkcr kkct kkkk kknn kkno kknt kkon kkoo kkor kkot kkrc kkrk kkrn kkro kkrr kkrt kktc kktk knck kncn knco kncr knct knkk knkt knnk knnr knoc knok knon knor knot knrk knro kntk kntn knto kntr kock kocn koct kokc kokk kokn koko kokr konc konk kono kont kooc kook koon kooo koor koot korc kork korn koro korr kort kotc kotk kotn koto kotr kott krcc krcn krco krkc krkk krkn krko krkr krnk krnn krno krnt kroc krok kroo kror krrc krrk krrn krro krrr krrt krtc krtk krtn krto krtr ktcc ktck ktco ktcr ktkc ktkk ktkn ktko ktkr ktkt ktnc ktnk ktnn ktno ktnt ktoc ktok kton ktoo ktor ktot ktrc ktrk ktrn ktro ktrr ktrt kttc kttk kttn ktto kttr kttt nccc nccn nccr ncct ncnc ncoc ncor ncrc nctc nctr nknt nkok nkor nktr nnnn nnot nntn nock noco noct noko non- nonn nono nont noo- nook noon nooo noor noot nor- norc nork norn noro norr nort not- noto nott nroc nron nrrc ntcc ntrc ntto nttr occc occn occt ocon ocro ocrr oct- octo okko okno okok okon okor okot okro okto onc- onco onct onno onon onor ont- ontc onto oocr oont oooo oort orco orko ornc orno oro- orok oron oror orot orro ortc orto oto- otok oton otoo otor otro otto rccc rcnr rcon rctc rnco rnnt rnot rocc rock roco rokk roko rokr ronc ronk rono ront rook roon roor root rorc rork roro rort rotc rotk rotn roto rotr rott rrrr rtcc rtkn tccc tcnn tcon tctc tkon tncc tock toco toko tonk tonn tono took toon toor toot torc tork torn toro torr tort totc toto totr tott trcc trno troc tron troo trot trtc trtr ttcn tton tttt