-ene -one cccc ccee cche ccnc ccne ccoc cec- cece ceco ceec cen- cene ceno chce chch chec chee cheh chen chnc chno choc choh chon choo cnco cnoh coce coch coco coen cohn coho con- conc cone conn cono cooh coon eccc ecce ecco eche echo ecne eco- econ eeee eeoc ehcc eheh ehen ence ench enco enee eneo ennc enne eno- enoc enoe enon eone hccc hcch hech hehe hehn heho hene henh henn heno hhhh hnce hoce hoch hocn hoen hohe hohn hoho hone hono hooe hoon nccc nccn ncec ncee ncen nchc ncnc ncoc necc nece nech neco neen nehe nene nenh neno neo- neoc neon neoo nhcc nhnn nhon nnnn noce noch noco nohn noho non- none nonn nono noo- noon nooo o-eo occc occn oce ocee oche ocon oec- oecc oeec oen- oeno ohcc ohee ohen ohho ohne ohno ohoh onc- once onco one- onec onee oneh oneo onne onno onon ooho oone oooh oooo