bbbb bbin bblb bibb bibi bibl bibo biin bili bill bilo bin- bini binn bino bio- bioi biol bion birb biri birl birn biro birr blin blio blir blni blno blob blon bloo bnib bnin bnor bnrr bobb bobi bobo boi- boii boil boin boli boll boln bolo boni bonn bono boob bool boon boor bor- bori born boro borr bril brin brio brno brob brol bron broo bror brrr i-no ibon ibri ibro iiii iiio iino iioi iioo ilin ilio ilir ill- illi illo ilni ilno iloo inbo inni inno innr ino- inoi inol inon inor inri inro iobi ioii ioio iolo ioni ionn iono iooi iooo iori iri- iril irin irio irlb irob iron irri lblr libo libr liii liin liir lilb lili lill lilo linn lino lio- lion lior liri lirl lirn liro lirr llll lloo lob- lobb lobi lobo loin loir loli loll lolo loni lono lonr loob lool loon loor lori lorn loro lroi lron lrrr n-ii nbbo nibi nibo niir nili nill nilo nini ninl nino nion nioo niro nlrb nnnn nobi nobo noib noil noin noio noir noli noll nolo non- noni nonn nono noo- noob nool noon nooo noor nor- norb nori norn noro norr nrlb nron nrrl obbo obin oboi obol obon obor obri obro oiii oion olbo olib olin olio olli ollo olon olor onil onir onni onno onon onor oobi oolo oooo orbb orbi orbo ori- oril orin orio orlo orni orno oro- oron oror orri orro rbbb rbbr rib- ribo riin rill rilo rinn rino riol rion riri rlin rnbr rnin rnli rob- robb robi robo roil roin roio roir roll rolo roni rono roob rooi rool roon roor rori roro rrrr