-ene -one bbbb bbeb bbet bbox 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 boox botb bote botn boto bott bten btex btob bttb ebbo eben ebno eboe ebon eboo ebox eeee eent eete eext enb- enbn enee eneo enne eno- enoe enon ent- ente ento eone eont eoto etee eten etne etoe eton etox ette ettn etto exen exo- exon exte nbbo nebb nebe nebn nebo neeb neen neet nene neno nent neo- neon neoo neot neox net- netb nete neto nett nexe nexo next nexx nnnn nnot nntn nobo non- none nonn nono nont nonx noo- noob noon nooo noot not- note noto nott ntto o-eo obbo oben obet obex oboe obon obot obox oen- oeno one- oneb onee oneo onex onne onno onon ont- onto oobe oone oont oooo ootb otee oten oto- otoe oton otoo otte otto oxen oxo- oxon oxox oxxo tbox tebo teen teet tenb tene tenn teno tent teon tete teto tett tetx text tneb tobe tobo tobt toee toen toet tonb tone tonn tono toon toot tote toto tott tox- toxo toxt ttbb tten tteo ttoe tton tttt txen xbee xbox xen- xene xenn xeno xeon xexe xnee xnet xote xoxo xxxo xxxx