-ene -one cccc cccf ccee ccfc ccff cche ccnc ccne ccnf ccoc cec- cece ceco ceec cef- cefc cefn cen- cene ceno cfcf cfcn cfco chce chch chec chee chef cheh chen chfc chnc chno choc choh chon choo cnco cnoh coce coch coco coen cofc cofe coff cohn coho con- conc cone conf conn cono coof cooh coon eccc ecce ecco ecef ecfc eche echo ecne eco- econ eeee eefe eefn eeoc efco efen efeo efon ehcc eheh ehen ence ench enco enee eneo ennc enne eno- enoc enoe enon eone fccf fcch fece fech feen fefc fefe feff fefo fene fenn feof feoh feon ffcc ffee ffff foce foch foco fofo fohn fone fono foof foon hccc hcch hcfc hech heef hefe hehe hehn heho hene henh henn heno hfce hhhh hhof hnce hoce hoch hocn hoen hofe hoff hohe hohn hoho hone hono hooe hoof hoon nccc nccf nccn ncec ncee ncef ncen ncfc ncfe nchc ncnc ncoc necc nece nech neco neef neen nefe neff nefh nehe nene nenh neno neo- neoc neon neoo nfff nfon nhcc nhnn nhon nnnn noce noch noco nohn noho non- none nonn nono noo- noon nooo o-eo occc occn oce ocee ocef oche ocon oec- oecc oeec oen- oeno ofen off- offc offe offh offo ofno ohcc ohee ohen ohho ohne ohno ohoh onc- once oncf onco one- onec onee oneh oneo onne onno onon ooff ooho oone oooh oooo