bbbb bibb bibi bibo biko bio- bioi birb biri birk biro birr bizz bobb bobi bobo boi- boii boki boko boob book boor booz bor- bori bork boro borr borz bozi bozo brik brio briz brkb brob brok broo bror broz brrr bzrk bzzz ibri ibro iiii iiio iioi iioo ikki ikko ikoo ikri iobi ioii ioio ioko iooi iooo iori iri- irio irki irob irri izki izzo kbbb kbbi kbbk kbbo kbbr kbbz kbib kbik kbio kbiz kbkb kbkk kbko kbkr kbkz kbob kboi kbok kboo kboz kbrb kbri kbrk kbro kbrz kbzi kbzo kbzz kibb kibi kibo kibr kibz kiii kiik kiki kikk kiko kikr kikz kioi kiok kioo kioz kirb kiri kirk kiro kirr kizz kkbb kkbi kkbo kkbr kkbz kkik kkkk kkob kkoo kkor kkoz kkrb kkrk kkro kkrr kkrz kkzz kobb kobi kobk kobo kobr koii koir kokb koki kokk koko kokr kokz koob kooi kook kooo koor kooz korb kori kork koro korr kozb kozi kozk kozo kozr krbb krbi krbk krbr krbz krib krik krio kriz krki krkk krko krkr krkz krob kroi krok kroo kror kroz krrb krri krrk krro krrr krrz krzi krzk krzr krzz kzbb kzbi kzbk kzbr kzbz kzio kziz kzkr kzkz kzoi kzoo kzor kzoz kzrb kzrk kzro kzrr kzrz kzzb kzzi kzzk kzzo kzzr kzzz obbo obkb oboi obok obor obri obro oiii oiko okir okko okok okor okro oobi oooo oozi orbb orbi orbo ori- orio orko oro- orok oror oroz orri orro orzk orzo rbbb rbbr rib- ribo riki rikk rioz riri rizi rizk rizz rob- robb robi robo roik roio roir roiz roki rokk roko rokr roob rooi rook roor rooz rori rork roro rozi rozz rrrr z-ro zbik zibo ziki zikr ziri ziro zizi zizz zobo zoio zoo- zook zorb zori zork zoro zozo zzzz