-ene -one cccc cccv ccee cche ccnc ccne ccoc ccvo cec- cece ceco ceec cen- cene ceno cevo chce chch chec chee cheh chen chev chnc chno choc choh chon choo chov chvo cnco cnoh coce coch coco coen cohn coho con- conc cone conn cono conv cooh coon cove covo cvcc cven eccc ecce ecco eche echo ecne eco- econ eeee eeoc eevn ehcc eheh ehen en-v ence ench enco enee eneo ennc enne eno- enoc enoe enon eone even evoe evon evoo hccc hcch hech hehe hehn heho hene henh henn heno heve hevn hhhh hnce hoce hoch hocn hoen hohe hohn hoho hone hono hooe hoon hove hvcc nccc nccn ncec ncee ncen nchc ncnc ncoc necc nece nech neco neen neev nehe nene nenh neno neo- neoc neon neoo neve nevo nhcc nhnn nhon nnnn noce noch noco nohn noho non- none nonn nono noo- noon nooo noov nov- nove novo nvcc 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 ovee oven ovo- ovon ovoo vche vcon vecc vech veen veho ven- vene venn veno veoh veve vevo vhhh voce voho vone vonn vooc vvvv