-ene -one -yne cccc cccp ccee ccnc ccne ccnp ccny ccoc ccpe ccpn ccpp cec- cece ceco cecp ceec cen- cene ceno ceny ceop cepc cepe cepo cepp cnco cncp cnep coce coco cocp coen coep con- conc cone conn cono cony coon coop cope copo copp copy coyn coyo cpce cpep cyc- cycc cyen cyn- cyne cyno cyon cypc cyy- cyyc cyyn eccc ecce ecco ecne eco- econ ecop ecpp eeee eeny eeoc ence enco ency enee eneo eney ennc enne enny eno- enoc enoe enon enoy enp- enye enyo eone epcc epec epee epen epoc epon eppc eppo eppp eppy eyec eyen eyey eyne eype nccc nccn nccp ncec ncee ncen ncep ncnc ncoc ncpc necc nece neco necy neen neep nene neno neo- neoc neon neoo nepc nepe neye neyn neyo nnnn noce noco non- none nonn nono noo- noon nooo noop nope noye noyo npcc nppc nycc nyce nyco nycy nyen nyne nyny nyon nypc nype o-eo occc occn oce ocee ocon ocpp oec- oecc oeec oen- oeno oeye oeyo onc- once onco one- onec onee oneo onep oney onne onno onon onoy oone oooo opec open opep opo- opon oppo oppy opye oyce oyee oyen oyne oyon pccc pcce pcep pcoe pcpn pcpp pece peco pecy peec peen peep pen- penc pene penn peno peny peon pepe pepo peyn peyo pnec pnon pnpo pnpp poce poco poey ponc pone pono ponp pony poon poop pop- popc pope popo popp popy poyn poyo ppcc ppen pppn pppo pppp ppye pyce pyep pyn- pyne pyo- pyon pype pypy yccc ycee yeen yeep yenc yene yeon yepe yepp yeye yeyo ynce ynne ynon yoen yone yono yoon yoop yopo yopy yoye yoyn yoyo ypcc yyyy