-er -ol bbb bbe bbf bbk bbl bbo bbr be- beb bee bef bek bel beo ber bfb bfe bff bfl bfo bfr bkb bke bkf bkk bkl bko bkr blb ble blf blk bll blo blr bob boe bof bok bol boo bor brb bre brf brk brl bro brr ebb ebe ebf ebk ebl ebo ebr eeb eee eef eek eel eeo eer ef- efb efe eff efl efo efr ekb eke ekf ekl eko ekr elb ele elf elk ell elo elr eo- eob eoe eof eok eol eoo eor erb ere erf erk erl ero err fbb fbe fbf fbk fbl fbo fbr feb fee fef fek fel feo fer ffe fff ffk ffl ffo ffr fkb fkf fkk fkl flb fle flf fll flo flr fob foe fof fok fol foo for frb fre frf frk frl fro frr kbb kbe kbf kbk kbl kbo kbr ke- keb kee kef kek kel keo ker kff kfo kkb kke kkk kkl kkr kl- klb klf klo klr kob koe kof kok kol koo kor krf krk krl kro krr lbb lbe lbf lbk lbl lbo lbr leb lee lef lek lel leo ler lfb lfe lff lfk lfl lfo lfr lkb lkl lkr llb lle llf llk lll llo llr lob loe lof lok lol loo lor lrb lrf lrk lro lrr ob- obb obe obf obk obl obo obr oeb oee oef oel oeo oer of- ofb ofe off ofl ofo ofr okb oke okk okl oko okr olb ole olf olk oll olo oo- oob oof ook ool ooo oor or- orb ore orf ork orl oro orr rbb rbe rbf rbk rbl rbo rbr re- reb ree ref rek rel reo rer rfb rfe rff rfk rfl rfo rfr rkb rke rkf rkk rko rle rlf rll rlo rlr rob roe rof rok rol roo ror rrb rrf rrk rrl rrr

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b-r-k bbbee bbook be-er be-ro bebek bebel beber beblo beebe beeke beele beffe befoe befol befor beker bekke bekko bekok belbo belee belef belek bellb belle bello belok beofe beoff berbe berek berel berk- berke berko berle berlo berob beroe berok berol beror berre bleek bleer bleke blekk blere bloef bloke blook bloor blorb blore bo-bo bobek bobko boble bobok bobr bobre boeke boeol boero boffo bokel bokeo boker bokko bokok bokor bolbe bolek bolel boleo boler bolko boll- bolle bollo bolok booer booke booko boole boore borbo boree borek borel borer borko borle boro- borok boroo borre borro breef breek breel breer breke brell brelo breo- brere brobo broek broer