-ene cccc cccp ccee ccnc ccne ccnp ccnr ccpe ccpn ccpp ccpr ccrc ccre ccrp ccrt cctc cctt cec- cece cecp cect ceec cen- cene cent cepc cepe cepp cepr cept cer- cerc cere cern cerp cert cet- cete cetp cncp cnep cnet cnrc cnrr cnrt cntc cntr cpce cpep cper cpnt cpre cprt cptp cptr crcc crce crcr cre- crec cree cren crep cret crne crpc crrt crtc crtp ctcp ctec cten ctep ctne ctpp ctrc ctrn ctrp cttn eccc ecce ecct ecne ecpp ecrc ecrr ect- ectc eeee eent eerc eetc eete ence enee ener ennc enne enp- ent- ente entp entr epcc epec epee epen eper eppc eppp eprp epte ercc erce ercp erec eren erer eret erne erpe errc erre etcc etec etee eten eter etne etnr etre ette ettn nccc nccn nccp nccr ncct ncec ncee ncen ncep ncer ncnc ncpc ncrc ncre ncrp nctc ncte nctr necc nece necr nect neen neep neer neet nene nent nepc nepe nepr nept nerc nere nerr nert net- nete nett nnnn nnpr nntn npcc nppc nprt nptc npte nptn nren nrpc nrpn nrrc ntcc nter ntpc ntrc nttr pccc pcce pcep pcer pcnt pcpn pcpp pcrc pcre pcte pece pecr pect peec peen peep peer peet pen- penc pene penn pent pepe per- perc pere pern perp perr pert pete petn petr pett pnec pnet pnpp pntr ppcc ppen pper pppn pppp pprc pptn pptt prcc prcp pre- prec pree pren prep pret prnp prtc prtp prtr ptcc pten pter pttc rccc rcep rcet rcnr rcpt rctc recc rece recp recr rect reen reep reet rene renn rent repe repp repr rept rere rert rete retr rett rncp rnnt rntp rpet rppn rptn rrrr rtcc rtce rtee rttp tccc tcep tcnn tctc tecr tect teec teen teer teet tenc tene tenn tenp tent tepe tepp ter- terc tere tern terp terr tete tetr tett tncc tpcp tper tppp tppr tpte tptp tptr trcc tre- trec tree tren tret trpc trpe trpn trpp trtc trte trtr ttcn ttcp tten tter tttt