-ene -one eeee enee eneo enne ennu eno- enoe enon enp- enue eone epee epen epon eppo eppp n-up neen neep nene neno nenu neo- neon neoo nepe neue neun neuo neuu nnnn non- none nonn nono nonu noo- noon nooo noop nope noun noup nuee nune nunn nuno nuon nupe o-eo oen- oeno one- onee oneo onep onne onno onon onpu onue onup oone oooo open opep opo- opon oppo ouen oun- oune oupe ouu- peen peep pen- pene penn peno penu peon peou pepe pepo peun pneu pnon pnpo pnpp pnup pone pono ponp poon poop pop- pope popo popp poun poup ppen pppn pppo pppp pu-e pueo pueu pune puno punu pupe pupu ueno unee unen unne unno unon unop uone upen upne upnp upon uppe uppp uppu upup uuen uuno uuuu