-ene -one bbbb bbeb bebb bebe bebo beeb been bene benn beno benu beo- beon bobb bobe bobo bobu boee boen boeo bone bonn bono bonu boob booe boon boue boun bubb bube bubo bubu buen bueu bunb bune bunn buno bunu buon ebbo eben ebno eboe ebon eboo eeee enb- enbn enee eneo enne ennu eno- enoe enon enue eone nbbo nebb nebe nebn nebo nebu neeb neen nene neno nenu neo- neon neoo neue neun neuo neuu nnnn nobo nobu non- none nonn nono nonu noo- noob noon nooo noun nube nuee nune nunn nuno nuon o-eo obbo oben oboe obon oen- oeno one- oneb onee oneo onne onno onon onue oobe oone oooo ouen oun- oune ouu- ubbe ubbo ubon ueno unbe uneb unee unen unne unno unon uone uuen uuno uuuu