bbbb bbin bibb bibi bibo biin bin- bini binn bino binu binz bio- bioi bion biou birb biri birn biro birr biru bizu bizz bnib bnin bnor bnrr bobb bobi bobo bobu boi- boii boin boiu boni bonn bono bonu boob boon boor booz bor- bori born boro borr boru borz boun bour bozi bozo brin brio briz brno brob bron broo bror brou broz brrr brun bruz bubb bubi bubo bubu buin buir buiu bunb buni bunn buno bunu bunz buon bur- burb buri burn buro burr buru burz buuz buzi buzz bzou bzzz i-no ibon ibri ibro iiii iiio iino iioi iioo inbo inni inno innr innu ino- inoi inon inor inou inoz inri inro inui inun iobi ioii ioio ioni ionn iono iooi iooo iori ioun iri- irin irio irob iron irri irun iuiu iuno izon izzo n-ii nbbo nibi nibo niir niiu nini nino nion nioo niou niro niru niur nnnn nobi nobo nobu noib noin noio noir non- noni nonn nono nonu noo- noob noon nooo noor nor- norb nori norn noro norr noun nour nozi nron nubi nuin nunn nuno nuon nuri nurn nurr nuru nuzi nzrb obbo obin oboi obon obor obri obro oiii oion onir onni onno onon onor onoz onur onzo oobi oooo oozi orbb orbi orbo orbu ori- orin orio orni orno oro- oron oror oroz orri orro orub orzo orzu ouii ouin ouir oun- our- ourn ouro ouu- ouzo ozon ozun rbbb rbbr rib- ribo ribu riin rinn rino rion riou rioz riri rizi rizu rizz rnbr rnin rob- robb robi robo robu roin roio roir roiu roiz roni rono roob rooi roon roor rooz rori roro roru roub roun rouz rozi rozz rrrr rrun rubb rubi rubu ruin ruiz runi runn runo ruri ruro ruru ruun ruzi ubbi ubbo ubii ubir ubon uirr uni- unii unin unio unir unni unno unon unro unuz uor- urbi urib urin uriu urni uro- uroo urri urun urur uruz uuni uuno uuri uuuu uzin uzon uzun uzzi z-ro zibo zinn zino zion ziri ziro zizi zizz zobo zoio zon- zoni zoo- zoon zorb zori zorn zoro zozo zozu zrin zubi zubo zubr zubu zuni zunz zuoz zurb zurn zurr zuru zuun zuzu zzzz