cccc cccp ccee ccpe ccpp ccpr ccrc ccre ccrp ccrt cctc cctt cec- cece cecp cect ceec cepc cepe cepp cepr cept cer- cerc cere cerp cert cet- cete cetp cexe cpce cpep cper cpre cprt cptp cptr crcc crce crcr cre- crec cree crep cret crex crpc crrt crtc crtp ctcp ctec ctep ctpp ctrc ctrp cxxx eccc ecce ecct ecpp ecrc ecrr ect- ectc eeee eerc eetc eete eext epcc epec epee eper eppc eppp eprp epte epxp er-x ercc erce ercp erec erer eret erpe errc erre etcc etec etee eter etre ette exec exer expr expt exrx exte extr pccc pcce pcep pcer pcpp pcrc pcre pcte pece pecr pect peec peep peer peet pepe per- perc pere perp perr pert pete petr pett ppcc pper pppp pprc pptt prcc prcp pre- prec pree prep pret prex prtc prtp prtr ptcc pter pttc rccc rcep rcet rcpt rctc recc rece recp recr rect reep reet repe repp repr rept rere rert rete retr rett rexx rpet rrrr rtcc rtce rtee rtex rttp tccc tcep tctc tecr tect teec teer teet tepe tepp ter- terc tere terp terr tete tetr tett tetx text tpcp tper tppp tppr tpte tptp tptr trcc tre- trec tree tret trex trpc trpe trpp trtc trte trtr ttcp tter tttt txtr xeer xer- xert xexe xpcc xper xrep xtep xxxx