eeee eeke eete eetu ekek eker eket ekpe ekur epee eper eppp eprp epte erer eret erke erpe erre ertu erur etee eter etre ette ettu euer eur- eure eurt keek keep keer keet keke keku kep- kepe kept kepu ker- kere kerk kerp kerr kert keru ket- kete ketk ketp ketr kett ketu keup keur kkkk kkpk kkpt kkre kkrk kkrr kkrt kktk kktu kkup kkut kkuu kpek kper kpet kpke kpkk kpkr kppk kppp kppr kpre kprk kprp kprr kprt kpru kpte kptr kptt kpur kree krek kret kreu krke krkk krkr krku krpr krpt krpu krre krrk krrr krrt krtk krtr krue kruk krup krur ktee ktek ktep ktke ktkk ktkr ktkt ktku ktpk ktpr ktpt ktre ktrk ktrp ktrr ktrt ktru kttk kttp kttr kttt kttu kuek kueu kuke kukk kuku kupe kupr kupt kupu kure kurk kurr kurt kuru kute kutp kutr kutt kutu kuuk kuur kuuu peek peep peer peet peke pekk pepe per- pere perk perp perr pert peru pete petr pett peur peut pper pppp ppru pptt ppur pre- pree prek prep pret preu prtp prtr prue prut pruu pter pttk pu-e puer puet pueu puke puku pupe pupu pur- pure purp purr puru put- pute putt putu reek reep reet reke rekt repe repp repr rept repu rere rert reru rete retr rett reue reuk reup reut reuu rpet rrrr rtee rttp ruer ruet ruke rukk ruku rupe rupp rupt rure rurp ruru rute rutt rutu teek teer teet teke tepe tepp tepu ter- tere terk terp terr teru tete tetr tett tetu teuk teut tper tpke tppp tppr tpte tptp tptr tput tre- tree trek tret treu trpe trpp trte trtr true truk trut truu tter tttt tuer tuet tuke tupe tupu ture turk turp turr turt turu tute tutt tutu u-rp ukek ukeu ukup ukur uppe uppp uppu upup ure- uret urke urre urte uruk urup urur urut utep uter uttu uuuu