-ene -one cccc cccf cccp ccee ccfc ccff ccnc ccne ccnf ccnp ccoc ccpe ccpn ccpp cec- cece ceco cecp ceec cef- cefc cefn cen- cene ceno ceop cepc cepe cepo cepp cfcf cfcn cfco cfpo cnco cncp cnep coce coco cocp coen coep cofc cofe coff con- conc cone conf conn cono coof coon coop cope copo copp cpce cpep cpff eccc ecce ecco ecef ecfc ecne eco- econ ecop ecpp eeee eefe eefn eeoc efco efen efeo efon ence enco enee eneo enfp ennc enne eno- enoc enoe enon enp- eone epcc epec epee epen epfc epoc epon eppc eppo eppp fccf fccp fece feen fefc fefe feff fefo fene fenn feof feon fepc ffcc ffee ffff foce foco fofo fone fono foof foon fopp fp-c fpcc nccc nccf nccn nccp ncec ncee ncef ncen ncep ncfc ncfe ncnc ncoc ncpc necc nece neco neef neen neep nefe neff nene neno neo- neoc neon neoo nepc nepe nfff nfon nnnn noce noco non- none nonn nono noo- noon nooo noop nope npcc nppc o-eo occc occn oce ocee ocef ocfp ocon ocpp oec- oecc oeec oen- oeno ofen off- offc offe offo ofno onc- once oncf onco one- onec onee oneo onep onne onno onon ooff oone oooo opec open opep opo- opon oppo pccc pcce pcep pcfc pcoe pcpn pcpp pece peco peec peen peep pefc peff pen- penc pene penn peno peon pepe pepo pfce pfff pnec pnon pnpo pnpp poce poco poff ponc pone pono ponp poof poon poop pop- popc pope popo popp ppcc ppen pppn pppo pppp