-ene -one -yne cccc ccee ccnc ccne ccny ccoc cec- cece ceco ceec cen- cene ceno ceny cnco coce coco coen con- conc cone conn cono cony coon coyn coyo cyc- cycc cyen cyn- cyne cyno cyon cyy- cyyc cyyn eccc ecce ecco ecne eco- econ eeee eeny eeoc ence enco ency enee eneo eney ennc enne enny eno- enoc enoe enon enoy enye enyo eone eyec eyen eyey eyne nccc nccn ncec ncee ncen ncnc ncoc necc nece neco necy neen nene neno neo- neoc neon neoo neye neyn neyo nnnn noce noco non- none nonn nono noo- noon nooo noye noyo 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 oyce oyee oyen oyne oyon yccc ycee yeen yenc yene yeon yeye yeyo ynce ynne ynon yoen yone yono yoon yoye yoyn yoyo yyyy