eeee eefe eeke effi efik efke eiei eier eike eiki eipr eire ekek eker ekki ekpe epee eper epi- epie epik epip eppp eprp erei erer erie erik erke erki erpe erre f--k feek feer fefe feff fefi feie feir feke fere ferk ferr ffee ffff ffii ffrr fief fier fife fiff fifi fiii fike fiki fipp fire firk fprf free frei frep frie frik frip ieie iere ieri ifer ifrf ifri iiie iiii iipf ikee iker ikki ikri ipek iper ipie ipkf ippf ippr ipri iree irer irfe iri- irie irip irki irpe irre irri keef keek keep keer keff kefr keif keii keik keir keke keki kep- kepe kepi ker- kere kerf keri kerk kerp kerr kfer kfff kffk kfir kfpr kfre kfri kfrp kfrr kief kier kife kiff kifr kiii kiik kiip kikf kiki kikk kikr kip- kipe kipi kipp kipr kirf kiri kirk kirp kirr kkfi kkfr kkik kkkk kkpk kkre kkrf kkrk kkrr kpek kper kpfk kpfr kpif kpir kpke kpkk kpkr kppk kppp kppr kpre kprf kpri kprk kprp kprr kree kref krei krek krfe krff krfp krik krke krki krkk krkr krpi krpr krre krrf krri krrk krrr peek peep peer peff peip peir peke peki pekk pepe pepi per- pere perf peri perk perp perr pfff pffr pfkp piep pier piff piip pike piki pikk pipe pipi pipp pire piri pirk pirr pper ppie ppif pppp pprf pre- pree pref prek prep pri- prie prif prii prri reef reek reep refe reff refi refr reif reii reik reir reke reki repe repi repp repr rere reri rfef rief riek riep rier rife riff riif rike riki rikk ripe ripi ripp ripr rire riri rkkf rpii rrif rrrr