cccc ccee ccoc ccrc ccre ccrt cctc cctt cec- cece ceco cect ceec ceke ceor cer- cerc cere cero cert cet- cete ceto ckck ckco cker ckoc ckoo ckor ckot ckrc coce cock coco coct cok- coke coko cook coot cor- corc core cork coro corr cort cotc cote coto cott crcc crce crcr cre- crec cree creo cret crkc croc croe crok croo cror crot crrt crtc ctec ctor ctot ctrc eccc ecce ecco ecct ecko eco- ecot ecrc ecrr ect- ectc ecto eeee eeke eeoc eerc eero eetc eete ekco ekek eker eket eore eotc eoto ercc erce erec erer eret erke eroc eroe eroo errc erre erro etcc etco etec etee eter etoe etok etre etro ette etto kccc kcck kccr kcct kcec kcee kceo kcet kckc kckk kcko kckr kcoe kcor kcot kcrc kcro kcrr kcrt kctc kcte kcto keck keco kecr keek keer keet kekc keke keko keok ker- kerc kere kerk kero kerr kert ket- ketc kete ketk keto ketr kett kkck kkco kkcr kkct kkkk kkoo kkor kkot kkrc kkre kkrk kkro kkrr kkrt kktc kktk kock koct kokc koke kokk koko kokr kooc kook kooo koor koot korc kore kork koro korr kort kotc kote kotk koto kotr kott krcc krce krco krec kree krek kreo kret krkc krke krkk krko krkr kroc kroe krok kroo kror krrc krre krrk krro krrr krrt krtc krtk krto krtr ktcc ktce ktck ktco ktcr ktec ktee ktek ktkc ktke ktkk ktko ktkr ktkt ktoc ktoe ktok ktoo ktor ktot ktrc ktre ktrk ktro ktrr ktrt kttc kttk ktto kttr kttt o-eo occc occt oce ocee ocet ocke ocre ocro ocrr oct- octe octo oec- oecc oeec oere oker oket okko okok okor okot okre okro okto oocr ooer oooo oore oort orce orco ore- orec orek oreo orer orke orko oro- oroe orok oror orot orro ortc orte orto otee oter oto- otoe otok otoo otor otre otro otte otto rccc rcet rctc recc rece reck recr rect reek reet reke reko rekt reot rere rero rert rete reto retr rett rocc roce rock roco roer roet roke rokk roko rokr rook roor root rorc rore rork roro rort rotc rote rotk roto rotr rott rrrr rtcc rtce rtee tccc tctc teck teco tecr tect teec teek teer teet teke teok teor ter- terc tere terk tero terr tete teto tetr tett toce tock toco toee toek toer toet toke toko took toor toot torc tore tork toro torr tort totc tote toto totr tott trcc tre- trec tree trek treo tret troc troe troo trot trtc trte trtr tteo tter ttoe tttt