-ene cccc cccp ccee ccnc ccne ccnp ccnr ccpe ccpn ccpp ccpr ccrc ccre ccrp cec- cece cecp ceec cen- cene cepc cepe cepp cepr cer- cerc cere cern cerp ceze cncp cnep cnnz cnrc cnrr cpce cpep cper cpre crcc crce crcr crcz cre- crec cree cren crep crne crpc eccc ecce ecne ecpp ecrc ecrr eeee eerc eeze ence enee ener enez ennc enne enp- epcc epec epee epen eper eppc eppp eprp ercc erce ercp erec eren erer erez erne erpe errc erre ezer nccc nccn nccp nccr ncec ncee ncen ncep ncer ncnc ncpc ncrc ncre ncrp necc nece necr neen neep neer nene nepc nepe nepr nerc nere nerr nerz nnnn nnpr npcc nppc nren nrpc nrpn nrrc nzcc nzpc nzpp pccc pcce pcep pcer pcpn pcpp pcrc pcre pece pecr pecz peec peen peep peer pen- penc pene penn penz pepe per- perc pere pern perp perr peze pnec pnpp ppcc ppen pper pppn pppp pprc prcc prcp pre- prec pree pren prep prez prnp rccc rcep rcnr recc rece recp recr recz reen reep rene renn renz repe repp repr rere reze rncp rppn rrrr zeep zenn zepp zeze znen zrce zrze zzzz