-ene -one bbbb bbeb bbet bebb bebe bebo beeb been beet bene benn beno bent beo- beon beot bete beto bett bnet bobb bobe bobo boee boen boeo boet bone bonn bono bont boob booe boon boot botb bote botn boto bott bten btob bttb ebbo eben ebno eboe ebon eboo eeee eent eete enb- enbn enee eneo enne eno- enoe enon ent- ente ento eone eont eoto etee eten etne etoe eton ette ettn etto nbbo nebb nebe nebn nebo neeb neen neet nene neno nent neo- neon neoo neot net- netb nete neto nett nnnn nnot nntn nobo non- none nonn nono nont noo- noob noon nooo noot not- note noto nott ntto o-eo obbo oben obet oboe obon obot oen- oeno one- oneb onee oneo onne onno onon ont- onto oobe oone oont oooo ootb otee oten oto- otoe oton otoo otte otto tebo teen teet tenb tene tenn teno tent teon tete teto tett tneb tobe tobo tobt toee toen toet tonb tone tonn tono toon toot tote toto tott ttbb tten tteo ttoe tton tttt