-ene -one -yne cccc cccv ccee ccnc ccne ccny ccoc ccvo cec- cece ceco ceec cen- cene ceno ceny cevo cevy cnco coce coco coen con- conc cone conn cono conv cony coon cove covo covy coyn coyo cvcc cven cyc- cycc cyen cyn- cyne cyno cyon cyve cyy- cyyc cyyn eccc ecce ecco ecne eco- econ eeee eeny eeoc eevn en-v ence enco ency enee eneo eney ennc enne enny eno- enoc enoe enon enoy envy enye enyo eone even evey evoe evon evoo eyec eyen eyey eyne nccc nccn ncec ncee ncen ncnc ncoc necc nece neco necy neen neev nene neno neo- neoc neon neoo neve nevo nevy neye neyn neyo nnnn noce noco non- none nonn nono noo- noon nooo noov nov- nove novo novy noye noyo nvcc nycc nyce nyco nycy nyen nyne nyny nyon o-eo occc occn oce ocee ocon oec- oecc oeec oen- oeno oeye oeyo onc- once onco one- onec onee oneo oney onne onno onon onoy oone oooo ovee oven ovey ovo- ovon ovoo oyce oyee oyen oyne oyon vcon vecc veen ven- vene venn veno veny veve vevo vevy veye veyn voce vone vonn vooc voye vvvv vyce vyne vyny yccc ycee yeen yenc yene yeon yeve yeye yeyo ynce ynne ynon yoen yone yono yoon yove yoye yoyn yoyo yven yvon yyyy