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 cpce cpep cper cpre cprt cptp cptr crcc crce crcr cre- crec cree crep cret crpc crrt crtc crtp ctcp ctec ctep ctpp ctrc ctrp eccc ecce ecct ecpp ecrc ecrr ect- ectc eeee eerc eetc eete epcc epec epee eper eppc eppp eprp epte ercc erce ercp erec erer eret erpe errc erre etcc etec etee eter etre ette 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 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 rpet rrrr rtcc rtce rtee rttp tccc tcep tctc tecr tect teec teer teet tepe tepp ter- terc tere terp terr tete tetr tett tpcp tper tppp tppr tpte tptp tptr trcc tre- trec tree tret trpc trpe trpp trtc trte trtr ttcp tter tttt