bbbb bbin bblb bibb bibi bibl bibo biin bili bill bilo bilu bin- bini binn bino binu bio- bioi biol bion biou birb biri birl birn biro birr biru blin blio blir blni blno blob blon bloo blou blub blur bnib bnin bnor bnrr bobb bobi bobo bobu boi- boii boil boin boiu boli boll boln bolo bolu boni bonn bono bonu boob bool boon boor bor- bori born boro borr boru boul boun bour bril brin brio brno brob brol bron broo bror brou brrr brun bubb bubi bubo bubu buin buir buiu bulb buli bull bulu bunb buni bunn buno bunu buol buon bur- burb buri burl burn buro burr buru i-no ibon ibri ibro iiii iiio iino iioi iioo ilin ilio ilir ill- illi illo ilni ilno iloo inbo inni inno innr innu ino- inoi inol inon inor inou inri inro inui inul inun iobi ioii ioio iolo ioni ionn iono iooi iooo iori ioun iri- iril irin irio irlb irob iron irri irul irun iuiu iuno lblr libo libr libu liii liin liir lilb lili lill lilo lilu linn lino lio- lion lior liri lirl lirn liro lirr liru liun llll lloo lob- lobb lobi lobo loin loir loiu loli loll lolo loni lono lonr loob lool loon loor lori lorn loro loui loul loun lour louu lroi lron lrrr luin luli lull lulu luni lunn luno luri n-ii nbbo nibi nibo niir niiu nili nill nilo nilu nini ninl nino nion nioo niou niro niru niur nlrb nnnn nobi nobo nobu noib noil noin noio noir noli noll nolo non- noni nonn nono nonu noo- noob nool noon nooo noor nor- norb nori norn noro norr noul noun nour nrlb nron nrrl nubi nubl nuin nuli null nunn nuno nuon nuri nurl nurn nurr nuru obbo obin oblu oboi obol obon obor obri obro oiii oion olbo olib olin olio olli ollo olon olor olur onil onir onni onno onon onor onur oobi oolo oooo orbb orbi orbo orbu ori- oril orin orio orlo orlu orni orno oro- oron oror orri orro orub ouii ouin ouir oulu oun- our- ourn ouro ouu- rbbb rbbr rib- ribo ribu riin rill rilo rilu rinn rino riol rion riou riri rlin rnbr rnin rnli rob- robb robi robo robu roil roin roio roir roiu roll rolo roni rono roob rooi rool roon roor rori roro roru roub roul roun rrrr rrun rubb rubi rubu ruin rull rulo runi runn runo ruri ruro ruru ruun ubbi ubbo ubii ubir ubli ublo ubon uirr ulli ullo ullr ulno ulo- ulul uni- unii unin unio unir unni unno unon unro uor- urbi urib urin uriu urni uro- urol uroo urri urun urur uulu uuni uuno uuri uuuu