bbbb bbeb bbet bbpr bebb bebe bebi bebo beeb beep beer beet beir beit beo- beor beot bepo bere beri bero berr bert beru bete beti beto bett betu beur bibb bibe bibi bibo bieb bier biet bieu bio- bioi biot biou bipp bipu birb bire biri biro birr birt biru bite bito bitt bitu bobb bobe bobi bobo bobu boee boeo boep boer boet boi- boie boii boit boiu boob booe boop boor boot bope bopp bor- bore bori boro borr bort boru botb bote boti boto bott boue boup bour bout bpoe bpot bpti breb bree brei breo brep brer bret brie brio brit brob broe broo bror brot brou brrr brue brup brut btbp btie btob btor btrt bttb bubb bube bubi bubo bubu buer bueu buie buir buit buiu bur- burb bure buri buro burp burr burt buru but- bute buti buto butt ebbo ebbr eber ebit eboe eboo ebor ebpo ebro ebru ebur eeee eero eete eetu eiei eier eiou eipo eipr eire eitb eiti eito eitr eoir eore eori eoto epee eper epi- epie epip epit epor epot eppo eppp eprb epro eprp epte epub erbb erbe ereb erei erer eret erie erio erit eriu erob eroe eroi eroo erpe erre erro ertu erub erur etbr etee eter etio etoe etre etro ette etti etto ettu etui eubi euer euoi eur- eure euro eurt i-be ibet ibie ibot ibri ibro ibtb ieet ieie ieio iere ieri iett iiie iiii iiio iiit iioi iioo iiop iitr iitt iobi ioee ioii ioio ioit iooi iooo iore iori iote ioto iper ipet ipie ipoe ipop ippo ippr ipri ipto ipur iput irbe irbp iree irer iri- irie irio irip irob irop irpe irre irri irte irti irtp itbe itep iter itet itie itoi itoo itor itou itri itto itup itur iuiu iupp o-eo obbo ober obet obie obit oboe oboi obor obot obre obri obro oere oeti oier oiii oire oirt oiti oobe oobi ooer oooo oore oort ootb ootp opei opep oper opet opie opii opio opit opo- opor oppi oppo opti opto orbb orbe orbi orbo orbu ore- oreb oreo orer ori- orie orio orit oro- oroe oror orot orpe orpi orri orro orte orto orub orup otee otep oter otit oto- otoe otoo otor otpp otre otro otte otti otto ottu otur ouer ouie ouii ouir ouit oupe our- oure ouro ourt out- outb oute outi outo ouu- peep peer peet peio peip peir peit peor peou pepe pepi pepo per- pere peri pero perp perr pert peru pete peti peto petr pett peur peut pibb pibi piep pier piet piip piob piot pipe pipi pipo pipp pire piri piro pirr piru pite piti pito pitr pitt pitu pobo poer poet poio poop poor poot pop- pope popi popo popp popt porb pore pori poro porr port pote poti poto pott potu poui poup pour pout pper ppib ppie pppo pppp ppru pptt ppur pre- preb pree prep pret preu pri- prie prii pro- prob proe proo prop prot prou prri prti prtp prtr prue prut pruu pter ptop ptui pu-e pube pubu pueo puer puet pueu puir puit puiu pupe pupi pupu pur- purb pure puri puro purp purr puru put- pute puti puto putt putu rbbb rbbr rebb rebe rebo rebu reeb reep reet reii reir reit reiu reop reot reou repe repi repo repp repr rept repu rere reri rero rert reru rete reti reto retr rett reue reup reut reuu rib- ribe ribo ribu riep rier riet rieu riot riou ripe ripi ripp ripr ript rire riri rite riti rito ritt ritu riue rob- robb robe robi robo robt robu roer roet roio roir roit roiu roob rooi roop roor root rope ropo rore rori roro rort roru rote roti roto rotr rott roub roue roup rout rpet rpii rpob rpoe rrrr rtee rtei rttp rubb rube rubi rubp rubu ruer ruet ruit rupe rupp rupt rure ruri ruro rurp ruru rute ruti ruto rutt rutu tbit tbrb tbtp tebo tebu teer teet teie teip teir teiu teor tepe tepi tepp tepu ter- tere teri tero terp terr teru tete teti teto tetr tett tetu teut tibi tibu tie- tiee tiei tieo tiep tier tiet tiit tiiu tiop tiou tip- tipe tipi tipo tipp tipt tipu tirb tire tiri tiro tirr tiru tite titi tito titp titt titu tobe tobi tobo tobt tobu toee toei toer toet toie toit toor toot top- tope topi topo topp topt topu tore tori toro torp torr tort toru tote toti toto totr tott toui toup tour tout tper tpir tppp tppr tpte tptp tptr tput tre- tree trei treo tret treu tri- trib trie trio trip trit troe troi troo trop trot trou trpe trpp trte trtr trub true trut truu ttbb tteo tter ttoe ttop tttt tubb tube tubo tubr tubu tuei tuer tuet tuit tuiu tuor tupe tupi tupo tupu turb ture turi turo turp turr turt turu tute tuti tuto tutt tutu tuuo u-ie u-rp ubbe ubbi ubbo uber ubet ubii ubir ubit ueir uepi uipi uirr uor- uore upbe upie upor uppe uppp uppu upri upto upup urbe urbi ure- uret urib urie uriu uro- uroo urpo urre urri urte urup urur urut utep uter utor utri utti utto uttu uuri uuuu