bbbb bbin bibb bibi bibo biin bin- bini binn bino binz bio- bioi bion birb biri birn biro birr bizz bnib bnin bnor bnrr bobb bobi bobo boi- boii boin boni bonn bono boob boon boor booz bor- bori born boro borr borz bozi bozo brin brio briz brno brob bron broo bror broz brrr bzzz i-no ibon ibri ibro iiii iiio iino iioi iioo inbo inni inno innr ino- inoi inon inor inoz inri inro iobi ioii ioio ioni ionn iono iooi iooo iori iri- irin irio irob iron irri izon izzo n-ii nbbo nibi nibo niir nini nino nion nioo niro nnnn nobi nobo noib noin noio noir non- noni nonn nono noo- noob noon nooo noor nor- norb nori norn noro norr nozi nron nzrb obbo obin oboi obon obor obri obro oiii oion onir onni onno onon onor onoz onzo oobi oooo oozi orbb orbi orbo ori- orin orio orni orno oro- oron oror oroz orri orro orzo ozon rbbb rbbr rib- ribo riin rinn rino rion rioz riri rizi rizz rnbr rnin rob- robb robi robo roin roio roir roiz roni rono roob rooi roon roor rooz rori roro rozi rozz rrrr z-ro zibo zinn zino zion ziri ziro zizi zizz zobo zoio zon- zoni zoo- zoon zorb zori zorn zoro zozo zrin zzzz