-ene -one bbbb bbeb bbet bbfn bebb bebe bebo beeb beef been beet befe beff befo beft bene benn beno bent beo- beof beon beot bete beto bett bftt bnet bobb bobe bobo boee boef boen boeo boet bofe boff bone bonn bono bont boob booe boof boon boot botb bote botn boto bott bten btob bttb ebbo eben ebno eboe ebon eboo eeee eefe eefn eent eete efen efeo efet efon eft- enb- enbn enee eneo enfb enne eno- enoe enon ent- ente ento eone eont eoto etee eten etfb etfe etne etoe eton ette ettn etto febo feeb feen feet fefe feff fefo fene fenn fent feof feon fete fett ffee ffff fftf fnet fntb fobt fofo fone fono font foof foon foot fote foto fott ften nbbo nebb nebe nebn nebo neeb neef neen neet nefe neff nene neno nent neo- neon neoo neot net- netb nete neto nett nfff nfon nfto nnnn nnot nntn nobo non- none nonn nono nont noo- noob noon nooo noot not- note noto nott ntof ntto o-eo obbo oben obet oboe obon obot oen- oeno ofen off- offe offo ofno one- oneb onee oneo onne onno onon ont- onto oobe ooff oone oont oooo ootb otee oten oto- otoe otof oton otoo otte otto tbnf tebo teef teen teet teff teft tenb tene tenn teno tent teon tete teto tett tfeb tfot tneb tnef tobe tobo tobt toee toen toet toff tofo toft tonb tone tonn tono toof toon toot tote toto tott ttbb tten tteo ttff ttfn ttoe tton tttt