-ene -one eeee eefe eefn eent eete efen efeo efet efon eft- enee eneo enne eno- enoe enon ent- ente ento eone eont eoto etee eten etfe etne etoe eton ette ettn etto feen feet fefe feff fefo fene fenn fent feof feon fete fett ffee ffff fftf fnet fofo fone fono font foof foon foot fote foto fott ften neef neen neet nefe neff nene neno nent neo- neon neoo neot net- nete neto nett nfff nfon nfto nnnn nnot nntn non- none nonn nono nont noo- noon nooo noot not- note noto nott ntof ntto o-eo oen- oeno ofen off- offe offo ofno one- onee oneo onne onno onon ont- onto ooff oone oont oooo otee oten oto- otoe otof oton otoo otte otto teef teen teet teff teft tene tenn teno tent teon tete teto tett tfot tnef toee toen toet toff tofo toft tone tonn tono toof toon toot tote toto tott tten tteo ttff ttfn ttoe tton tttt