eeee eete eetu eiei eier eipr eire eiti eitr epee eper epi- epie epip epit eppp eprp epte eptv erei erer eret erev erie erit eriu erpe erre ertu erur eruv erve ervi etee eter etre ette etti ettu etui euer eur- eure eurt ever evet evie evir evre ieet ieie iere ieri iett ietv iiie iiii iiit iitr iitt iper ipet ipie ippr ipri iptv ipur iput iree irer iri- irie irip irpe irre irri irte irti irtp itep iter itet itie itri itup itur iuiu iupp iver ivie ivre ivue peep peer peet peev peip peir peit pepe pepi per- pere peri perp perr pert peru perv pete peti petr pett peur peut piep pier piet piip pipe pipi pipp pire piri pirr piru pite piti pitr pitt pitu pper ppie pppp ppru pptt pptv ppur pre- pree prep pret preu prev pri- prie prii priv prri prti prtp prtr prue prut pruu pter ptui pu-e puer puet pueu puir puit puiu pupe pupi pupu pur- pure puri purp purr puru put- pute puti putt putu reep reet reev reii reir reit reiu repe repi repp repr rept repu rere reri rert reru rete reti retr rett reue reup reut reuu reve revi revp riep rier riet rieu ripe ripi ripp ripr ript rire riri rite riti ritt ritu riue rive rivp rpet rpii rrrr rtee rtei rttp rtve rtvi ruer ruet ruit rupe rupp rupt rure ruri rurp ruru rute ruti rutt rutu ruve ruvi ruvu rver teer teet teev teie teip teir teiu tepe tepi tepp tepu ter- tere teri terp terr teru tete teti tetr tett tetu teut tie- tiee tiei tiep tier tiet tiit tiiu tip- tipe tipi tipp tipt tipu tire tiri tirr tiru tite titi titp titt titu tivi tper tpir tppp tppr tpte tptp tptr tput tre- tree trei tret treu trev tri- trie trip trit trpe trpp trpv trte trtr true trut truu tter tttt tuei tuer tuet tuit tuiu tupe tupi tupu ture turi turp turr turt turu tute tuti tutt tutu tver tvri tvrr tvtv u-ie u-rp ueir uepi uipi uirr upie uppe uppp uppu upri uptv upup ure- uret urie uriu urre urri urte urup urur urut urve utep uter utri utti uttu uuri uuuu uver uvri uvvu veep veer veet veie veii veip veir veit vepe vepr ver- vere veri vert vete veti vetr veur veve vevi vier viet vieu viii vipr vire viri virr virt viru vite viti vitt vitu viue vive vivi vret vt-i vtpr vuir vuit vurp vurt vuti vutv vver vvvv