-ene cccc cccp ccee ccgc ccnc ccne ccnp ccnr ccpe ccpn ccpp ccpr ccrc ccre ccrg ccrp cec- cece cecp ceec cege cen- cene ceng cepc cepe cepp cepr cer- cerc cere cern cerp cgcc cgcg cger cncp cnep cnrc cnrr cpce cpep cper cpre crcc crce crcr cre- crec cree creg cren crep crne crpc eccc ecce ecne ecpg ecpp ecrc ecrr eeee eeng eerc eerg egcc egcg egcr egec egee eger egge eggp egne egpe egpn egre ence enee eneg ener enge engg engr ennc enne enp- epcc epec epee epen eper eppc eppp eprp ercc erce ercp erec eren erer erg- ergg erne erpe errc erre gc-c gccc gcpc gcrg gece geen geep geer gege gegg gen- genc gene geng genn gepe gere gern gggg ggrn gncc gngc gnpc gnrc gnrr gper gpgp gprp grcc grce grec gree greg gren grep grpc grrr nccc nccn nccp nccr ncec ncee ncen ncep ncer ncgr ncnc ncpc ncrc ncre ncrp necc nece necr neen neep neer nege negp nene neng nepc nepe nepr nerc nere nerr ngen nger ngpc nngn nnnn nnpr npcc nppc nren nrpc nrpn nrrc pccc pcce pcep pcer pcgg pcpn pcpp pcrc pcre pece pecr peec peen peep peer pegg pen- penc pene peng penn pepe per- perc pere perg pern perp perr pgcc pgce pger pgrc pnec pnpp ppcc ppen pper pppn pppp pprc prcc prcp pre- prec pree preg pren prep prnp rccc rcep rcgc rcnr rcrg recc rece recp recr reen reep rege regn regr rene reng renn repe repp repr rere rerg rncp rppn rrrr