eeee eefe eery effi effy eiei eier eipr eire eiry epee eper epi- epie epip eppp eppy eprp erei erer erie erpe erre erye eyer eyey eyfi eyir eype eyre eyry eyyr feer fefe feff fefi feie feir fere ferr fery feyr ffee ffff ffii ffrr fief fier fife fiff fifi fiii fipp fire firy fprf free frei frep frey frie frip frye fyfe fyfi fyre fyry ieie iere ieri ifer iffy ifrf ifri iiie iiii iipf iper ipie ippf ippr ippy ipri iree irer irfe iri- irie irip iriy irpe irre irri iyer iyre peep peer peff peip peir pepe pepi per- pere perf peri perp perr pery peyr pfff pffr piep pier piff piip pipe pipi pipp pipy pire piri pirr piry piye pper ppie ppif pppp pprf ppye pre- pree pref prep prey pri- prie prif prii prri pyep pype pypy pyr- pyre pyri pyry reef reep refe reff refi refr reif reii reir repe repi repp repr repy rere reri rery reye rfef rief riep rier rife riff riif ripe ripi ripp ripr rire riri riyf rpii rrif rrrr ryfe ryff ryif ryip rype ryyf yeep yeer yefe yeff yeie yeii yeir yepe yepp yere yeri yerr yery yeye yeyi yeyr yiff yipe yire yirr ypir yyfe yyff yyyy