-er eee eek eer ees eet eex eke ekr eks ekt eku ere erk err ers ert eru es- ese esk esr ess est esu esx ete etk etr ets ett etu etx eu- eue eur eus eut eux ex- exe exr exs ext exu exx k-t ke- kee kek ker kes ket kex kke kkk kkr kks kkt kku krk krr krs krt kru kse ksk ksr kss kst ksu kte ktk ktr kts ktt ktu kue kuk kur kus kut kuu re- ree rek rer res ret reu rex rke rkk rks rkt rku rrk rrr rrs rrt rru rse rsk rsr rss rst rsu rsx rte rtk rtr rts rtt rtu rtx rue ruk rur rus rut ruu rux rxr rxs se- see sek ser ses set seu sex sk- ske skk skr sks skt sku skx sr- sre srk srr srs srt srx ss- sse ssk ssr sss sst ssu ssx ste stk str sts stt stu stx sue suk sur sus sut suu sux sxs sxt sxu t-x te- tee tek ter tes tet teu tex tke tkk tkr tks tkt tre trk trr trs trt tru trx tse tsk tsr tss tst tsu tsx tte ttk ttr tts ttt ttu ttx tue tuk tur tus tut tuu tux txe txk txs txt txu uee uer ues uet uke ukk ukr uku ur- ure urk urr urs urt uru urx use usk usr uss ust usu usx ute utk utr uts utt utu utx uue uur uus uut uuu uxr uxt uxu xee xer xes xet xeu xex xke xks xrt xrx xss xst xtr xts xtx xue xus xxx

eeee eees eeke eeks eers eese eesk eete eets eetu eext ekek eker ekes eket ekur er-x erer eres eret erke erks erre errs erse erst erts ertu erur erus esee esek eser eses eset eske esks esku esse esst essu este estr ests esus etee eter etes etre etsu ette ettu etux euer eur- eure eurt euse exer exes exrx exte extr exts keek keer kees keet keke keks keku ker- kere kerk kerr kers kert keru kerx kesk kesr kess kest ket- kete ketk ketr kets kett ketu ketx keur keus kexs kexx kkex kkkk kkre kkrk kkrr kkrs kkrt kkrx kkse kksr kkss kkst kksu kktk kkts kktu kktx kkus kkut kkuu kkxk kkxs kkxt kkxx kree krek kres kret kreu krex krke krkk krkr krks krku krkx krre krrk krrr krrs krrt krrx krse krsk krsr krss krst krsu krsx krtk krtr krts krtx krue kruk krur krux krxk krxr krxt krxx ksee ksek kser kset ksex kske kskk kskr ksks ksku kskx ksrr ksrs ksrt ksrx ksse kssr ksss ksst kssu kssx kste kstk kstr ksts kstt kstu ksue ksut ksuu ksux ksxt ktee ktek ktex ktke ktkk ktkr ktks ktkt ktku ktkx ktre ktrk ktrr ktrs ktrt ktru ktrx ktsr ktst ktsu kttk kttr ktts kttt kttu kttx ktux ktxk ktxr ktxt kuek kues kueu kuke kukk kuks kuku kure kurk kurr kurs kurt kuru kust kusu kute kutr kuts kutt kutu kutx kuuk kuur kuuu kuxx kxet kxex kxkk kxks kxkt kxku kxkx kxre kxrk kxrr kxrs kxrx kxse kxss kxst kxte kxtk kxts kxtt kxtx kxus kxxe kxxk kxxr kxxt kxxx reek rees reet reke reks rekt rere rers rert reru rese ress rest rete retr rets rett reue reuk reus reut reuu reux rexx rkss rkts rrrr rsee rsre rsts rstu rtee rtes rtex rtss rtts ruer rues ruet ruke rukk ruku rure rurs ruru ruse rusk russ rust rusu rute ruts rutt rutu rxes se-e se-k se-s se-t se-u se-x seek seer sees seet seeu seex seke sekk sekt seku sere serk serr sers sert seru sese sess sest set- sete sets sett setx seur seux sex- sexe sext skee sker skes sket skrt skss skue skur skut skux sres srtr ssee sses sset ssex ssrs ssss ssts stee stek ster stes stet stex stks stre strk strs stru stss sttr stue stuk stur stus stut stux suee suer sues suet sueu suke suks suku sur- sure surr surs surt suru sus- suse susk suss sust susu sute sutu suus sux- suxe suxt teek teer tees teet teke ter- tere terk terr ters teru tese tess test tete tetr tets tett tetu tetx teuk teut text tkts tre- tree trek tres tret treu trex trst trte trtr true truk trus trut truu trux tses tset tsks tsse tssr tsst tsts tter ttss tttt tuer tues tuet tuke tuks ture turk turr turs turt turu tusk tuss tust tute tuts tutt tutu tuxs txtr uers uess uext ukek ukes ukeu ukur ure- ures uret urex urke urre urse urss ursu urte urts uruk urur urus urut us-k usee user uses uset uske usse ussr usss usst ussu uste usts usus uter utes uttu uuuu uxue uxus xeer xer- xers xert xeus xexe xkes xtsr xurs xuxu xxxx

-tree eeeee ekers ekker ekuku ekuru erere eresk erest erets erres errtu erses erste ersts erte erter ertes eruke eruts esere esker esser esses essex essse essue estee ester estes estet estre estur estus esure eteke etest etete etext etree etrek etres etter ettes eturu eurex eurre eurus euser exert exter extre extts extue exust exute k-set k-ute keeks keere keest keets kerek keres keret kerre kerrs kerse kerss kertu kerux keser kesse keste ketek keter kette kexes kreek krees kreke kresk kress krest krete kreuk kruse krust kuksu kukur kurek kurku kurre kurse kursk kurte kurts kuruk kurus kurux kusur kutte kuttu kutur kutus kuuse kuusk reeks reere reese reesk reest rekke rere- reree reres reret resee reses reset reske resse reste restr rests resue resus retee reter retes retex retsu rette retts reuer reuet reuse reuss reute rexer rexes rsust rt-rk rtext ruere ruers ruete rukke rukus ruses rusks russe ruste rusts rustu ruter rutte ruutu seeke seeks seere seers seese seest seesu seete seker sekes sekke sekur serer seres seret serke serre serse serss sert- serte