bbbb bbbs bbfn bbin bffs bfsi bfts bftt bibb bibi bibo bibs biff bifi biin biis bin- bini binn bino bins bint bio- bioi bion bios biot bis- biso biss bist bito bits bitt bnib bnin bnss bobb bobi bobo bobs boff bofs boi- boii boin bois boit boni bonn bono bons bont boob boof boon boos boot bosi bosn boso boss bost botb boti botn boto bots bott bsff bsfs bsin bsns bson bsos bsts btob btss bttb fbis ffff ffii ffss fftf fibs fiff fifi fifo fift fiii fini finn fino fins fint fion fios fisi fiss fist fiti fits fitt fntb fobs fobt fofo foin fois fono fons font foof foon foos foot fosb fosi foso foss fost foti foto fots fott fsfi fsfo fssf ftii ftos i-no ibfi ibis ibns ibon ibos ibot ibsf ibsn ibss ibtb ibts ifbb ifis ifit ifni ifno ifns ifsb ifso iftn ifto iiii iiio iiis iiit iino iioi iioo iios iisi iist iitt inbo infi info infs inis init inni inno inns ino- inoi inon inos inot inso inss inst inti intn into ints iobi ioii ioio ioit ioni ionn iono ions ioof iooi iooo ioos ioso iotf ioto isbn isbt isin isis isit isno isnt iso- isof ison isos issf issi isso isss isti isto ists itbs itif itin itis itno itof itoi iton itoo itos itsf itsi itso ittf itto n-ii nbbo nbti nfff nfib nfon nfto nibi nibo nibs niff nift niit nini nino nins nion nioo nios nisi niso niss nist nitb nitf niti nito nits nnit nnnn nnos nnot nnss nntn nobi nobo nobs nofi noib noif noin noio nois noit non- noni nonn nono nons nont noo- noob noon nooo noos noot nos- noss nost not- noti noto nots nott nsbo nsfs nsin nsis nsof nsos nssb nssf nsso nsss nsts ntfs ntis ntof ntsb ntsf ntss ntto obbo obin obis obit oboi obon obos obot obsn obss obst obts off- offo offs ofit ofno ofst oiii oins oint oion oios oist oiti onis onit onni onno onon onos onso onst ont- onti onto oobi ooff oofs oons oont oooo ooos oosi oost ootb oots osii osin osis osno osoi osoo osos ossb ossi osso osti osts otbs otif otin otis otit oto- otof oton otoo otos otso otti otto otts s-ib s-ii s-os sbbs sbot sbsi sbst sbtn sfio sfnb sfnt sfos sfss sfts sibi sibo sibs siff sifo sift siit sini sinn sino sins sint sion sios siot sisi siss sist sit- siti sitn sito sits sitt snib snit snns snob snoo snos snot sobo sobs sobt sofi sofo soft soif soin sois soit son- soni sono sons sont soof soon soos soot sosi soso soss sost sotn soto sots ssbn ssin ssis ssit ssns ssot sssb sssf sssi ssss sstb ssts stbs stfn stib stif stio stis stit stnn stns stob stof ston stoo stos stot stsf stsi stss tbbs tbit tbnf tbst tfin tfot tfsi tfss tibi tibs tiff tifo tift tiit tini tinn tino tins tint tion tios tisb tisi tiso tiss tist titi tito tits titt tnts tobi tobo tobs tobt toff tofi tofo toft tois toit tonb toni tonn tono tons toof toon toos toot tosb tosi toso toss tost toti toto tots tott tsin tsis tsob tsoi tsos tssf tssi tsst tsts ttbb ttff ttfn tton ttss tttt