bbbb bbfn bbin bblb bffl bibb bibi bibl bibo biff bifi 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 bluf blur bnib bnin bnor bnrr bobb bobi bobo bobu boff bofu boi- boii boil boin boiu boli boll boln bolo bolu boni bonn bono bonu boob boof bool boon boor bor- borf bori born boro borr boru bouf boul boun bour brfu bril brin brio brno brob brol bron broo bror brou brrr brun bubb bubi bubo bubu buff bufo bufr buif buin buir buiu bulb buli bull bulu bunb buni bunn buno bunu buol buon bur- burb buri burl burn buro burr buru ffff ffii ffrr ffun fiff fifi fifo fiii fiil fili fill filn filo fini finn fino fion fior firn flii flin flnb flob flon floo flor flou flub fluf fluo flur fnuf fofo foil foin foli foll folo folr fono foof fool foon for- forb fori forl forn foro forr foul foun four frib fril frin frio frob frol fron frou frub frun fubb fubu fuff fufu fuil fuir fuli full fulu funf fuor fur- furi furl furn furo furr i-no ibfi ibon ibri ibro ifbb ifil ifni ifno ifnr ifor ifrb ifrf ifri iiii iiio iino iioi iioo ilin ilio ilir ill- illi illo ilni ilno iloo inbo infi infl info inni inno innr innu ino- inoi inol inon inor inou inri inro inui inul inun iobi ioii ioio iolo ioni ionn iono ioof iooi iooo iori ioun irfu iri- iril irin irio irlb irob iron irri irul irun iuiu iuno lblr libo libr libu liff lifl lifo liii liin liir lilb lili lill lilo lilu linn lino lio- lion lior liri lirl lirn liro lirr liru liuf liun llll lloo lob- lobb lobi lobo loff lofi lofn loif loin loir loiu loli loll lolo loni lono lonr loob loof lool loon loor lori lorn loro loui loul loun lour louu lrif lroi lron lrrr luff lufu luif luin luli lull lulu luni lunn luno luri n-ii nbbo nbfl nbuf nfff nfib nfon nibi nibo niff niir niiu nili nill nilo nilu nini ninl nino nion nioo niou niro niru niur nlrb nnnn nobi nobo nobu nofi noib noif noil noin noio noir nolf noli noll nolo non- noni nonn nono nonu noo- noob nool noon nooo noor nor- norb norf nori norn noro norr noul noun nour nrlb nron nrrl nubi nubl nuff nuin nuli null nunn nuno nuon nuri nurl nurn nurr nuru obbo obin oblu oboi obol obon obor obri obro off- offo offr offu ofno ofor oiii oion olbo olib olin olio olli ollo olof olon olor olur onil onir onlf onni onno onon onor onur oobi ooff oolo oooo orbb orbi orbo orbu orff orfi orfu ori- orif oril orin orio orlo orlu orni orno oro- orof oron oror orri orro orub ouff ouii ouin ouir oulu oun- our- ourn ouro ouu- rbbb rbbr rffl rib- ribo ribu riff rifu riif riin rill rilo rilu rinf rinn rino riol rion riou riri rlif rlin rnbr rnin rnli rob- robb robi robo robu roff rofl rofo roif roil roin roio roir roiu rolf roll rolo roni rono roob roof rooi rool roon roor rori roro roru roub rouf roul roun rrif rrrr rrun rubb rubi rubu ruff rufo ruif ruin rull rulo runf runi runn runo ruri ruro ruru ruun ubbi ubbo ubii ubir ubli ublo ubon uirr ulli ullo ullr ulno ulo- ulul uni- unif unii unin unio unir unlf unni unno unon unrf unro uofl uofo uor- urbi urff urfi urib urif urin uriu urni uro- urol uroo urri urun urur uulu uuni uuno uuri uuuu