-ene -one eeee eefe eefn efen efeo efon eheh ehen enee eneo enfp enne eno- enoe enon enp- eone epee epen eph- epon eppo eppp feen fefe feff fefo fene fenn feof feoh feon ffee ffff fofo fohn fone fono foof foon fopp heef heep hefe hehe hehn heho hene henh henn heno hepe hepp hhhh hhof hoen hofe hoff hohe hohn hoho hone hono hooe hoof hoon hoop hope hopf hopo hopp hppe neef neen neep nefe neff nefh nehe nene nenh neno neo- neon neoo nepe neph nfff nfon nhnn nhon nnnn nohn noho non- none nonn nono noo- noon nooo noop nope noph o-eo oen- oeno ofen off- offe offh offo ofno ohee ohen ohho ohne ohno ohoh one- onee oneh oneo onep onne onno onon ooff ooho oone oooh oooo open opep opo- opon oppo peen peep peff pehe peho pen- pene penh penn peno peon pepe pepo pfff phe- phen phno phoh phon phoo pnon pnpo pnpp poff pone pono ponp poof pooh poon poop pop- pope popo popp ppen pppn pppo pppp