-ene -one eeee eefe eefn eero efen efeo efon efor enee eneo ener enne eno- enoe enon eone eore eren erer erne erno eroe eron eroo erre erro feen feer fefe feff fefo fene fenn feof feon fere fern fero ferr ffee ffff ffrr foer fofo fone fono foof foon for- fore forn foro forr free fren freo froe fron neef neen neer nefe neff nene neno neo- neon neoo nere nerf nero nerr nfer nfff nfon nnnn noer non- none nonn nono noo- noon nooo noor nor- nore norf norn noro norr nren nron o-eo oen- oeno oere ofen ofer off- offe offo offr ofno ofor ofre one- onee oneo oner onne onno onon onor ooer ooff oone oooo oore ore- oren oreo orer orfe orff orne orno oro- oroe orof oron oror orro reef reen refe reff refn refr rene renn reno reof rere rero rfef roen roer rofe roff rofo rone rono roof roon roor rore roro rrrr