bbbb bbeb bbet bebb bebe bebi beeb beef beer beet befe beff beft beir beit bere beri berr bert beru bete beti bett betu beur bftt bibb bibe bibi bieb bief bier biet bieu biff bifi birb bire biri birr birt biru bite bitt bitu breb bree bref brei brer bret brfu brie brit brrr brue brut btie btrt bttb bubb bube bubi bubu buer bueu bufe buff bufr buie buif buir buit buiu bur- burb bure buri burr burt buru but- bute buti butt ebbr eber ebit ebru ebur eeee eefe eete eetu efbr efet effi efit eft- eftu eiei eier eire eitb eiti eitr erbb erbe ereb erei erer eret erft erie erit eriu erre ertu erub erur etbr etee eter etfb etfe etre ette etti ettu etui eubi euer eufi eur- eure eurt feeb feer feet fefe feff fefi feie feir feit ferb fere ferr fert feru fete feti fetr fett fetu ffee ffff ffii ffrr fftf fibe fief fier fife fiff fifi fift fiii fire fite fiti fitt free frei fret frib frie frit frub frue fter ftii ftub fubb fubu fuet fuff fufu fuir fuit fur- fure furi furr furt fute futi futu i-be ibet ibfi ibie ibri ibtb ieet ieie iere ieri ietf iett ifbb ifer ifit ifrb ifrf ifri iiie iiii iiit iitr iitt irbe iree irer irfe irfu iri- irie irre irri irte irtf irti itbe iter itet itie itif itrf itri ittf itur iuef iuiu rbbb rbbr rebb rebe rebu reeb reef reet refe reff refi refr reft refu reif reii reir reit reiu rere reri rert reru rete reti retr rett reue reuf reut reuu rfef rib- ribe ribu rief rier riet rieu rife riff rift rifu riif rire riri rite riti ritt ritu riue rrif rrrr rtbf rtee rtei rtfb rubb rube rubi rubu ruer ruet rufe ruff ruft ruif ruit rure ruri ruru rute ruti rutt rutu tbit tbrb tebu teef teer teet teff tefi teft teie teir teiu ter- tere terf teri terr teru tete teti tetr tett tetu teut tfeb tibi tibu tie- tiee tief tiei tier tiet tiff tift tiit tiiu tirb tire tiri tirr tiru tite titi titt titu tre- tree tref trei tret treu trfr tri- trib trie trif trit trte trtr trub true trut truu ttbb tter ttff tttt tubb tube tubr tubu tuei tuer tuet tufe tuff tufi tuft tufu tuit tuiu turb ture turf turi turr turt turu tute tuti tutt tutu u-ie ubbe ubbi uber ubet ubii ubir ubit ubtf ueir ufer uffe uirr urbe urbi ure- uret urfe urff urfi urft urib urie urif uriu urre urri urte urur urut uter utri utti uttu uuri uutf uuuu