-er b-u bbb bbe bbk bbm bbo bbr bbu be- beb bee bek bem beo ber beu bkb bke bkk bkm bko bkr bmb bme bmk bmm bmo bmr bmu bob boe bok bom boo bor bou brb bre brk brm bro brr bru bub bue buk bum buo bur buu ebb ebe ebk ebm ebo ebr ebu eeb eee eek eem eeo eer ekb eke eko ekr eku em- emb eme emk emm emo emr emu eo- eob eoe eok eom eoo eor eou erb ere erk erm ero err eru eu- eub eue eur kbb kbe kbk kbm kbo kbr kbu ke- keb kee kek kem keo ker kkb kke kkk kkm kkr kku kmb kme kmk kmm kmo kmu kob koe kok kom koo kor kou krk kro krr kru kub kue kuk kum kur kuu m-o m-r mbb mbe mbk mbm mbo mbr mbu meb mee mek mem meo mer meu mkb mke mkk mkm mko mkr mku mmb mme mmk mmm mmo mmr mmu mob moe mok mom moo mor mou mrb mre mrk mrm mro mrr mru mub mue muk mum mur muu ob- obb obe obk obm obo obr obu oeb oee oem oeo oer okb oke okk oko okr oku om- omb ome omm omo omr omu oo- oob ook oom ooo oor or- orb ore ork orm oro orr oru ou- oue ouk oum ouo our rbb rbe rbk rbm rbo rbr rbu re- reb ree rek rem reo rer reu rkb rke rkk rkm rko rku rmb rme rmm rmo rmr rob roe rok rom roo ror rou rrb rrk rrm rrr rru rub rue ruk rum ruo rur ruu ubb ube ubk ubo ubr ubu ueb uee uem uer ukb uke ukk ukr uku um- umb ume umm umo umr umu uob uoe uok uom uoo uor ur- urb ure urk urm uro urr uru uue uum uur uuu

bbbb bbeb bebb bebe bebo beeb beek beem beer beke beko beme bemu beo- beok beor bere berk berm bero berr beru beuk beur bobb bobe bobo bobu boee boeo boer boke boko boku bomb bome bomu boob booe book boom boor bor- bore bork borm boro borr boru boue bouk boum bour breb bree brek brem breo brer brkb brob broe brok brom broo bror brou brrm brrr brue brum bubb bube bubo bubu buem buer bueu buke bukk buko buku bum- bumb bur- burb bure burk burm buro burr buru ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeee eeke eemo eero ekeb ekek eker ekur embe embo embr emek emer emeu emme emmu emor emre eore erbb erbe ereb erem erer erke erme ermo erob eroe eroo erre erro erub erum erur euer eur- eure euro kbbb kbbe kbbk kbbm kbbo kbbr kbbu kbeb kbee kbek kbeo kber kbkb kbkk kbko kbkr kbmb kbme kbmo kbmr kbob kboe kbok kboo kbrb kbre kbrk kbro kbru kbub kbue kbuk kbur kbuu kebb kebe kebr kebu keek keem keer kekb keke keko keku kemb keme kemm kemo kemr kemu keok keom ker- kerb kere kerk kerm kero kerr keru keur kkbb kkbe kkbo kkbr kkkk kkmk kkmo kkmr kkob kkoo kkor kkrb kkre kkrk kkro kkrr kkuu kmbr kmem kmeo kmer kmke kmkk kmko kmme kmmk kmmm kmmo kmmr kmob kmoe kmok kmom kmor kmou kmrb kmro kmrr kmue kmur kobb kobe kobk kobo kobr kobu kokb koke kokk koko kokr koku komb kome komo komr koob kook kooo koor koou korb kore kork koro korr koru koub koue koum kour kouu krbb krbe krbk krbm krbr kreb kree krek krem kreo kreu krke krkk krko krkr krku krmb krme krmo krmr krob kroe krok krom kroo kror krrb krre krrk krrm krro krrr krue kruk krum krur kubb kube kubo kubr kubu kuek kueu kuke kukk kuku kume kumm kumo kumr kumu kuok kuoo kurb kure kurk kurm kuro kurr kuru kuub kuuk kuur kuuu mbou mebe mebo meek meem meer meke meko meme memo memr memu meok meor meou mer- merb mere merk merm mero meru meum mker mmmm mmor mobb mobe mobo moke moko mome momo momu moob mooe mook moor morb more mork moro moru moue mouk mour mrbb mrbm mreb mree mrkr mruk mube mubo muee muke muko mume mumm mumo mumu mure murk muro murr muru o-eo obbo ober obkb oboe obok obor obre obro oeme oere oerm oker okko okmo okok okom okor okre okro okur ombe ombo ombu omee omeo omer omo- omoe omoo omor omre omro omuo oobe ooer ooku oome oooo oore orbb orbe orbo orbu ore- oreb orek orem oreo orer orke orko orme ormo oro- oroe orok orom oror orro orub orum ouer oume our- oure ouro ouu- rbbb rbbr rbmk rebb rebe rebk rebo rebu reeb reek reem reke reko reme remo reou rere rero reru reue reuk reuu rob- robb robe robo robu roer roke rokk roko rokr roku romb rome romk romm romo roob rook room roor rore rork roro roru roub roue rouk roum rrkm rrrr rrum rubb rube rubu ruer ruke rukk ruku rumb rume rumm rumo ruok rure ruro ruru ubbe ubbo ubek uber ukek ukeu ukko ukok ukum ukur umb- umbe umbo umer ummo umoe umok umor uoke uomo uor- uore urbe ure- urke uro- urok urom uroo urre uruk urum urur uuuu

b-r-k bbbee bbook be-er be-ro bebek beber beebe beeke beker bekke bekko bekok bembe bembo bemer beour berbe berek berk- berke berko berme bermo berob beroe berok berom beror berre berru berum beuer beure bo-bo bobek bobko bobok bobr bobre boeke boeme boero boeur bokeo boker bokko bokok bokor bombe bombo bomer bomme booer booke booko boomb boore booru borbo boree borek borer borko borku bormo boro- borok borom boroo borou borre borro borum bouee bouer bouke bouko boure brebu breek breem breer breke breme bremm bremo breo- brere breu- brmmm brobo broek broer broke brom- brome bromo brook broom broue brouk brrrr bruer bruke brume