bbbb bbbs bbfn bbin bffs bfsi bfsr bfts bftt bibb bibi bibo bibs biff bifi biin biis bin- bini binn bino bins bint bio- bioi bion bios biot birb biri birn biro birr birs birt bis- biso biss bist bito bits bitt bnib bnin bnor bnrr bnss bobb bobi bobo bobs boff bofs boi- boii boin bois boit boni bonn bono bons bont boob boof boon boor boos boot bor- borf bori born boro borr bors bort bosi bosn boso boss bost botb boti botn boto bots bott brin brio bris brit brno brns brob bron broo bror bros brot brrr brrs brsb brsr brst bsff bsfs bsin bsns bson bsos bsts btob btor btrt btss bttb fbis fbrs ffff ffii ffrr ffss fftf fibs fiff fifi fifo fift fiii fini finn fino fins fint fion fior fios firn firs fisi fiss fist fiti fits fitt fnrs fntb fobs fobt fofo foin fois fono fons font foof foon foos foot for- forb fori forn foro forr fors fort fosb fosi foso foss fost foti foto fots fott frib frin frio fris frit frns frob fron fros frot frsb frso frst fsfi fsfo fssf ftii ftos ftrs ftsr i-no ibfi ibis ibns ibon ibos ibot ibri ibro ibsf ibsn ibss ibtb ibts ifbb ifis ifit ifni ifno ifnr ifns ifor ifrb ifrf ifri ifsb ifso iftn ifto iiii iiio iiis iiit iino iioi iioo iios iirs iisi iisr iist iitr iitt inbo infi info infs inis init inni inno innr inns ino- inoi inon inor inos inot inri inro inrs inso inss inst inti intn into intr ints iobi ioii ioio ioit ioni ionn iono ions ioof iooi iooo ioos iori iors ioso iotf ioto iri- irin irio iris irob iron irri irrs irsf irtf irti irts isbn isbt isin isis isit isno isnt iso- isof ison isor isos isri issf issi isso issr isss isti isto istr ists itbs itif itin itis itno itof itoi iton itoo itor itos itrf itri itrs itsf itsi itso ittf itto n-ii nbbo nbti nfff nfib nfon nfrs nfsr nfto nibi nibo nibs niff nift niir niit nini nino nins nion nioo nios niro nirs nirt nisi niso niss nist nitb nitf niti nito nitr nits nnit nnnn nnos nnot nnss nntn nobi nobo nobs nofi noib noif noin noio noir nois noit non- noni nonn nono nons nont noo- noob noon nooo noor noos noot nor- norb norf nori norn noro norr nors nort nos- noss nost not- noti noto nots nott nron nrts nsbo nsfs nsin nsis nsnr nsof nsos nssb nssf nsso nssr nsss nsts ntfs ntis ntof ntsb ntsf ntss ntto nttr obbo obin obis obit oboi obon obor obos obot obri obro obsn obsr obss obst obts off- offo offr offs ofit ofno ofor ofst oiii oins oint oion oios oirt oist oiti onir onis onit onni onno onon onor onos onso onst ont- onti onto oobi ooff oofs oons oont oooo ooos oort oosi oost ootb oots orbb orbi orbo orbs orff orfi orfs ori- orif orin orio oris orit orni orno orns oro- orof oron oror oros orot orri orro orrs orsi orso orto orts osii osin osis osno osnr osoi osoo osor osos osro ossb ossi osso osti ostr osts otbs otif otin otis otit oto- otof oton otoo otor otos otro otrs otso otti otto otts rbbb rbbr rbbs rbis rbss rbst rib- ribo ribs riff rifs rift riif riin riis rinf rinn rino rion rios riot riri rirs risi riso riss rist riti rito rits ritt rnbr rnin rnnt rnot rob- robb robi robo robs robt roff rofo roif roin roio roir rois roit roni rono rons ront roob roof rooi roon roor roos root rori roro rort rosi roso ross rost roti rotn roto rotr rots rott rrif rrrr rsbi rsis rsnn rsno rsnr rsos rsts rtbf rtfb rtns rtss rtts s-ib s-ii s-os sbbs sbor sbot sbsi sbst sbtn sfio sfnb sfnt sfor sfos sfro sfss sfts sibi sibo sibs siff sifo sifr sift siit sini sinn sino sins sint sion sior sios siot sirf siri siro sirr sirs sirt sisi siss sist sit- siti sitn sito sits sitt snib snir snit snns snob snoo snor snos snot snrs sntr sobo sobr sobs sobt sofi sofo soft soif soin soir sois soit son- soni sono sons sont soof soon soor soos soot sorb sori sorn soro sorr sors sort sosi soso soss sost sotn soto sots srfi srib sris srni srnn srno sros srtr ssbn ssbr ssin ssis ssit ssns ssot ssri ssrs sssb sssf sssi ssss sstb ssts stbs stfn stib stif stio stir stis stit stnn stnr stns stob stof ston stoo stor stos stot stri strn stro strs stsf stsi stss sttr tbbs tbit tbnf tbrb tbst tfin tfot tfrs tfsi tfss tibi tibs tiff tifo tift tiit tini tinn tino tins tint tion tios tirb tiri tiro tirr tirs 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 toor toos toot torf tori torn toro torr tors tort tosb tosi toso toss tost toti toto totr tots tott trfr tri- trib trif trin trio tris trit trno troi tron troo tros trot trsi trst trtr tsin tsis tsob tsoi tsos tssf tssi tssr tsst tsts ttbb ttff ttfn tton ttss tttt