-er b-u bbb bbd bbe bbk bbo bbr bbu bdb bdd bde bdk bdo bdr bdu be- beb bed bee bek beo ber beu bkb bke bkk bko bkr bob bod boe bok boo bor bou brb brd bre brk bro brr bru bub bud bue buk buo bur buu dbb dbd dbe dbk dbo dbr dbu ddb ddd dde ddk ddo ddr ddu de- deb ded dee dek deo der deu dkb dke dkk dko dkr dku dob dod doe dok doo dor dou drb drd dre drk dro drr dru dub dud due duk duo dur ebb ebd ebe ebk ebo ebr ebu ed- edb edd ede edk edo edr edu eeb eed eee eek eeo eer ekb ekd eke eko ekr eku eo- eob eod eoe eok eoo eor eou erb erd ere erk ero err eru eu- eub eud eue eur kbb kbd kbe kbk kbo kbr kbu kdb kde kdk kdo kdr kdu ke- keb ked kee kek keo ker kkb kke kkk kkr kku kob kod koe kok koo kor kou krd krk kro krr kru kub kud kue kuk kur kuu ob- obb obd obe obk obo obr obu odb odd ode odo odr odu oeb oed oee oeo oer okb okd oke okk oko okr oku oo- oob ood ook ooo oor or- orb ord ore ork oro orr oru ou- oud oue ouk ouo our rbb rbd rbe rbk rbo rbr rbu rdb rdd rde rdo rdr rdu re- reb red ree rek reo rer reu rkb rke rkk rko rku rob rod roe rok roo ror rou rrb rrd rrk rrr rru rub rud rue ruk ruo rur ruu ubb ube ubk ubo ubr ubu udb udd ude udk udo udr udu ueb ued uee uer ukb uke ukk ukr uku uob uod uoe uok uoo uor ur- urb urd ure urk uro urr uru uue uur uuu

bbbb bbdd bbdo bbeb bd-r bebb bebe bebo bede bedo bedu beeb beed beek beer beke beko beo- beod beok beor berd bere berk bero berr beru beuk beur bobb bobe bobo bobu bodb bode bodo bodu boee boeo boer boke boko boku boob bood booe book boor bor- bord bore bork boro borr boru boud boue bouk bour brdo breb bred bree brek breo brer brkb brob brod broe brok broo bror brou brrr brud brue bubb bube bubo bubu budb budd bude budo budu buer bueu buke bukk buko buku bur- burb burd bure burk buro burr buru d-bo dddd ddre ddub debe debu dedd dede dedo dedu deeb deed deek deer dek- deke deor der- derb dere derk dero derr deue deuk deur dobb dobe dobu dod- dodd dode dodo doek doer doke doko doob dood dook door dord dore dork doro dorr doru doub doud doue douk dour dred dree drek drob drod drou drub drue druk druu dub- dubb dube dubu dudd dude dudo dudu duer duke duku duo- dure durk duro duru duur ebbo ebbr ebed eber eboe eboo ebor ebro ebru ebur edde eddo ede- eder edod edou edru edur eede eedu eeee eeke eero ekeb eked ekek eker ekur eode eore erbb erbe erde ereb ered erer erke erob erod eroe eroo erre erro erub erur eude euer eur- eure euro kbbb kbbd kbbe kbbk kbbo kbbr kbbu kbdb kbde kbdo kbdr kbeb kbed kbee kbek kbeo kber kbkb kbkk kbko kbkr kbob kbod kboe kbok kboo kbrb kbrd kbre kbrk kbro kbru kbub kbud kbue kbuk kbur kbuu kdbb kdbr kddb kddd kddk kddr kdeb kdkb kdkd kdkk kdko kdkr kdoe kdok kdrb kdro kdub kdur kebb kebe kebr kebu kedb kedd kede kedo kedr keed keek keer kekb keke keko keku keok ker- kerb kere kerk kero kerr keru keur kkbb kkbd kkbe kkbo kkbr kkdd kkdo kked kkkk kkob kkoo kkor kkrb kkre kkrk kkro kkrr kkuu kobb kobe kobk kobo kobr kobu kode kodk kodo kodu koed kokb koke kokk koko kokr koku koob kook kooo koor koou korb kord kore kork koro korr koru koub koue kour kouu krbb krbd krbe krbk krbr krdd krde krdo krdr krdu kreb kred kree krek kreo kreu krkd krke krkk krko krkr krku krob krod kroe krok kroo kror krrb krre krrk krro krrr krue kruk krur kubb kubd kube kubo kubr kubu kudd kude kudo kudu kued kuek kueu kuke kukk kuku kuok kuoo kurb kurd kure kurk kuro kurr kuru kuub kuuk kuur kuuu o-eo obbo obed ober obkb oboe obok obor obre obro odbo oddd oded odeo oder odoo odor odou odur oedo oere oked oker okko okok okor okre okro okur oobe ooer ooku oooo oord oore orbb orbe orbo orbu orde ordo ordu ore- oreb ored orek oreo orer orke orko oro- oroe orok oror orro orub oude oued ouer our- oure ouro ouu- rbbb rbbr rder rebb rebe rebk rebo rebu redd rede redo redr redu reeb reed reek reke reko reod reou rerd rere rero reru reue reuk reuu rob- robb robe robo robu rodd rode rodo roed roer roke rokk roko rokr roku roob rood rook roor rore rork roro roru roub roud roue rouk rred rrrr rubb rube rubu rudd rude rudo rued ruer ruke rukk ruku ruok rurd rure ruro ruru ruud ubbe ubbo ubek uber ubod ubud uder udoo uduk ukek ukeu ukko ukok ukur uoke uor- uore urbe urde urdu ure- ured urke uro- urok uroo urre uruk urur uuuu

b-e-d b-r-k bbbee bbook bd-re bdoor be-er be-ro bebdo bebed bebek beber bebod bedde bedee beder bedok bedub bedue beduk beebe beede beeke beerd beker bekke bekko bekok beode beord beour berbe berde berdu bered berek berk- berke berko berob beroe berok beror berre berru beuer beure bo-bo bobek bobko bobok bobr bobre bodd- boded boder bodoe bodor boedo boeke boero boeur bokeo boker bokko bokod bokok bokor boode booed booer booke booko boord boore booru borbo borde bordo bored boree borek borer borko borku boro- borod borok boroo borou