cccc ccee ccoc ccrc ccre ccrt cctc cctt cec- cece ceco cect ceec ceor cer- cerc cere cero cert cet- cete ceto cexe coce coco coct coex coot cor- corc core coro corr cort cotc cote coto cott coxe crcc crce crcr cre- crec cree creo cret crex croc croe croo cror crot crrt crtc ctec ctor ctot ctrc cxro cxxx eccc ecce ecco ecct eco- ecot ecrc ecrr ect- ectc ecto eeee eeoc eerc eero eetc eete eext eore eotc eoto er-x ercc erce erec erer eret eroc eroe eroo errc erre erro etcc etco etec etee eter etoe etox etre etro ette etto exco exec exer exo- exor exrx exte extr o-eo occc occt oce ocee ocet ocre ocro ocrr oct- octe octo oec- oecc oeec oere oocr ooer oooo oore oort orce orco ore- orec oreo orer orex oro- oroe oror orot orro ortc orte orto otee oter oto- otoe otoo otor otre otro otte otto oxer oxo- oxox oxxo rccc rcet rctc recc rece recr rect reet reot rere rero rert rete reto retr rett rexx rocc roce roco roer roet roor root roox rorc rore roro rort rotc rote roto rotr rott roxo rrrr rtcc rtce rtee rtex tccc tctc teco tecr tect teec teer teet teor ter- terc tere tero terr tete teto tetr tett tetx text toce toco toee toer toet toor toot torc tore toro torr tort torx totc tote toto totr tott tox- toxo toxt trcc tre- trec tree treo tret trex troc troe troo trot trox trtc trte trtr tteo tter ttoe tttt txtr xeer xer- xero xert xexe xoco xoro xote xoxo xtro xxxo xxxx