-er b-u bbb bbe bbk bbo bbr bbu be- beb bee bek beo ber beu bkb bke bkk bko bkr bob boe bok boo bor bou brb bre brk bro brr bru bub bue buk buo bur buu ebb ebe ebk ebo ebr ebu eeb eee eek eeo eer ekb eke eko ekr eku eo- eob eoe eok eoo eor eou erb ere erk ero err eru eu- eub eue eur kbb kbe kbk kbo kbr kbu ke- keb kee kek keo ker kkb kke kkk kkr kku kob koe kok koo kor kou krk kro krr kru kub kue kuk kur kuu ob- obb obe obk obo obr obu oeb oee oeo oer okb oke okk oko okr oku oo- oob ook ooo oor or- orb ore ork oro orr oru ou- oue ouk ouo our rbb rbe rbk rbo rbr rbu re- reb ree rek reo rer reu rkb rke rkk rko rku rob roe rok roo ror rou rrb rrk rrr rru rub rue ruk ruo rur ruu ubb ube ubk ubo ubr ubu ueb uee uer ukb uke ukk ukr uku uob uoe uok uoo uor ur- urb ure urk uro urr uru uue uur uuu

bbbb bbeb bebb bebe bebo beeb beek beer beke beko beo- beok beor bere berk bero berr beru beuk beur bobb bobe bobo bobu boee boeo boer boke boko boku boob booe book boor bor- bore bork boro borr boru boue bouk bour breb bree brek breo brer brkb brob broe brok broo bror brou brrr brue bubb bube bubo bubu buer bueu buke bukk buko buku bur- burb bure burk buro burr buru ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeee eeke eero ekeb ekek eker ekur eore erbb erbe ereb erer erke erob eroe eroo erre erro erub erur euer eur- eure euro kbbb kbbe kbbk kbbo kbbr kbbu kbeb kbee kbek kbeo kber kbkb kbkk kbko kbkr kbob kboe kbok kboo kbrb kbre kbrk kbro kbru kbub kbue kbuk kbur kbuu kebb kebe kebr kebu keek keer kekb keke keko keku keok ker- kerb kere kerk kero kerr keru keur kkbb kkbe kkbo kkbr kkkk kkob kkoo kkor kkrb kkre kkrk kkro kkrr kkuu kobb kobe kobk kobo kobr kobu kokb koke kokk koko kokr koku koob kook kooo koor koou korb kore kork koro korr koru koub koue kour kouu krbb krbe krbk krbr kreb kree krek kreo kreu krke krkk krko krkr krku krob kroe krok kroo kror krrb krre krrk krro krrr krue kruk krur kubb kube kubo kubr kubu kuek kueu kuke kukk kuku kuok kuoo kurb kure kurk kuro kurr kuru kuub kuuk kuur kuuu o-eo obbo ober obkb oboe obok obor obre obro oere oker okko okok okor okre okro okur oobe ooer ooku oooo oore orbb orbe orbo orbu ore- oreb orek oreo orer orke orko oro- oroe orok oror orro orub ouer our- oure ouro ouu- rbbb rbbr rebb rebe rebk rebo rebu reeb reek reke reko reou rere rero reru reue reuk reuu rob- robb robe robo robu roer roke rokk roko rokr roku roob rook roor rore rork roro roru roub roue rouk rrrr rubb rube rubu ruer ruke rukk ruku ruok rure ruro ruru ubbe ubbo ubek uber ukek ukeu ukko ukok ukur uoke uor- uore urbe ure- urke uro- urok uroo urre uruk urur uuuu

b-r-k bbbee bbook be-er be-ro bebek beber beebe beeke beker bekke bekko bekok beour berbe berek berk- berke berko berob beroe berok beror berre berru beuer beure bo-bo bobek bobko bobok bobr bobre boeke boero boeur bokeo boker bokko bokok bokor booer booke booko boore booru borbo boree borek borer borko borku boro- borok boroo borou borre borro bouee bouer bouke bouko boure brebu breek breer breke breo- brere breu- brobo broek broer broke brook broue brouk brrrr bruer bruke bubbe buber buker bukk- bukor burek burke buroo burro burru buruk ebber ebeko ebook eboue ebure eeeee ekeko ekker ekuku ekuru eorre erbbe erber erere erkko eroor erore error eruke eubro euro- eurre k-rob kebbe kebek keber kebob keere kerek kerre ko-ko kobee kober kobru kobuk koeru koker kokko kokor kokou kokre kokur kooru korbe korbo korek korke korku koror korro korue koruk kouer koure kre-o kreek kreke kreo- kreuk kroke kubek kuber kubok kukko kukok kukur kurbu kurek kurku kurre kuruk o-r-b oboro oboue obreb obrok okeke okere okker okkur okobo okoro okubo okuku okuru oo-er ooooo oreo- orere orero orobe orobo oroer oroke orube oruku oruro ouoro oure- rebbe reber reere rekke rere- reree rerob reuer ro-ro robbe robbo rober robo- robor robur roero rokee roker rokke rokkk rooer rooke roore rooue rorbu rorer rorke rouer rouke rouko roure rubee ruber rubke rubor ruere rukke uber- ubobo ukeke ukobu uouee ureo- urker uroob urour urubu uuork uuuuu

bbbbbb bebook beebee beeker bekker bekoor bekoro berbee berbeo berber bereke bereko berere berker berour berrer berube beurre bobber bobeke bobrek bobrok boeber boerre bokere bokoro boober booboo booker booue borbor borkou boroko borore bororo boubou boueer boukou bouree bourke bourou bourre breere brekke breuer broker brokke brokkr brooke brouke brubru bruker bruree bubber bububu bukkur bukuru burbur burree burrer buruku e-book eburru eebree ekero erbree errour eureko eururo kebber kebero keeker keokee keokuk kerber kereru kerker kerkuk kerou keuruu koboko kokoku kokoro kokubo kookoo korber koreke korere korero korkor kororo korrek korubo koruru koubek koubou kouere koukou kouoro kourou kreker krokek kubeer kukere kuroko kurree kururu oberek oerbke okerer okoure ookroo oooooo orrour ouerre reboke rebook rebore rebouk rebour rebuke reebok reeker rerobe reubke reuere reuour robber rokker rokkor rokuko rokuro rooker rorek rourke rubbee rubber rubro- rurkee urouer uroure

bbbbbbb bebeeru bekoure berbere bkerke bok-bok boo-boo boobook borbore borrero bouere bourbre bourree bourrou brekker breuker brokour brooker brouere burbure eeeroer eerbeek erukkur kee-kee kobroor kokorou kor-kor korkoro korokke kreeker kroeber kurkure obrebek orebro oroboro orourke orrouer ourouer re-book re-bore rebroke rebuker rekeure rekouer robobee roebekk roorkee roukere rubbour rubroek ububboo

bbbbbbbb bekorobo berebere bo-bo-bo broubrou buruburu buurkerk