-ene -one bbbb bbeb bcbc bccc bcec bcvo bebb bebe bebo beeb been bene benn beno beo- beon bevo bnoc bobb bobe bobo boce boco boec boee boen boeo bonc bone bonn bono boob booc booe boon bove bovo c-bo cbbc cbcc cbce cbcn cbec cbee cbvb cbve cbvn ccbc ccbn cccb cccc cccv ccee ccnb ccnc ccne ccob ccoc ccvo cec- cece ceco ceeb ceec cen- cene ceno cevo cnbc cnco cobb cobe cobo coce coco coen con- conc cone conn cono conv coob coon cove covo cvcc cven ebbc ebbo ebcc eben ebno eboe ebon eboo ecbc ecbe eccb eccc ecce ecco ecne eco- econ eeee eeoc eevn en-v enb- enbn ence enco enee eneo ennc enne eno- enoc enoe enon eone even evoe evon evoo nbbc nbbo nbcc nbco ncbc nccc nccn ncec ncee ncen ncnc ncoc nebb nebe nebn nebo necc nece neco neeb neen neev nene neno neo- neoc neon neoo neve nevo nnnn nobc nobo noce noco non- none nonn nono noo- noob noon nooo noov nov- nove novo nvcc o-eo obbo obec oben oboe obon ocbc occc occn oce ocee ocon oec- oecc oeec oen- oeno onc- once onco one- oneb onec onee oneo onne onno onon oobe oone oooo ovee oven ovo- ovon ovoo vbcc vcon vecc veen ven- vene venn veno veve vevo voce vone vonn vooc vvob vvvv