eeee eero eery eore epee eper epor eppo eppp eppy epro eprp erer eroe eroo erpe erre erro erye eyer eyey eype eyre eyry eyyr o-eo oere oeye oeyo ooer oooo oore oory opep oper opo- opor oppo oppy opry opye ore- oreo orer orey oro- oroe oror oroy orpe orro orry oyee oyer oyre peep peer peor pepe pepo per- pere pero perp perr pery peyo peyr poer poey poop poor pop- pope popo popp popy pore poro porr pory poyo poyr pper pppo pppp ppye pre- pree prep prey pro- proe proo prop pyep pyo- pype pypy pyr- pyre pyro pyry reep reop repe repo repp repr repy rere rero rery reye roer roey roop roor rope ropo ropy rore roro rory roye rpoe rrrr rype yeep yeer yepe yepp yere yero yerr yery yeye yeyo yeyr yoop yopo yopy yore yoro yory yoye yoyo yyyy