-ene -one bbbb bbeb bcbc bccc bcec bebb bebe bebo beeb been bene benn beno beo- beon bnoc bobb bobe bobo boce boco boec boee boen boeo bonc bone bonn bono boob booc booe boon c-bo cbbc cbcc cbce cbcn cbec cbee ccbc ccbn cccb cccc ccee ccnb ccnc ccne ccob ccoc cec- cece ceco ceeb ceec cen- cene ceno cnbc cnco cobb cobe cobo coce coco coen con- conc cone conn cono coob coon ebbc ebbo ebcc eben ebno eboe ebon eboo ecbc ecbe eccb eccc ecce ecco ecne eco- econ eeee eeoc enb- enbn ence enco enee eneo ennc enne eno- enoc enoe enon eone nbbc nbbo nbcc nbco ncbc nccc nccn ncec ncee ncen ncnc ncoc nebb nebe nebn nebo necc nece neco neeb neen nene neno neo- neoc neon neoo nnnn nobc nobo noce noco non- none nonn nono noo- noob noon nooo 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