bbbb bbbs bbfn bbin bffs bfsi bfsr bibb bibi bibo bibs biff bifi biin biis bin- bini binn bino bins bio- bioi bion bios birb biri birn biro birr birs bis- biso biss bnib bnin bnor bnrr bnss bobb bobi bobo bobs boff bofs boi- boii boin bois boni bonn bono bons boob boof boon boor boos bor- borf bori born boro borr bors bosi bosn boso boss brin brio bris brno brns brob bron broo bror bros brrr brrs brsb brsr bsff bsfs bsin bsns bson bsos fbis fbrs ffff ffii ffrr ffss fibs fiff fifi fifo fiii fini finn fino fins fion fior fios firn firs fisi fiss fnrs fobs fofo foin fois fono fons foof foon foos for- forb fori forn foro forr fors fosb fosi foso foss frib frin frio fris frns frob fron fros frsb frso fsfi fsfo fssf i-no ibfi ibis ibns ibon ibos ibri ibro ibsf ibsn ibss ifbb ifis ifni ifno ifnr ifns ifor ifrb ifrf ifri ifsb ifso iiii iiio iiis iino iioi iioo iios iirs iisi iisr inbo infi info infs inis inni inno innr inns ino- inoi inon inor inos inri inro inrs inso inss iobi ioii ioio ioni ionn iono ions ioof iooi iooo ioos iori iors ioso iri- irin irio iris irob iron irri irrs irsf isbn isin isis isno iso- isof ison isor isos isri issf issi isso issr isss n-ii nbbo nfff nfib nfon nfrs nfsr nibi nibo nibs niff niir nini nino nins nion nioo nios niro nirs nisi niso niss nnnn nnos nnss nobi nobo nobs nofi noib noif noin noio noir nois non- noni nonn nono nons noo- noob noon nooo noor noos nor- norb norf nori norn noro norr nors nos- noss nron nsbo nsfs nsin nsis nsnr nsof nsos nssb nssf nsso nssr nsss obbo obin obis oboi obon obor obos obri obro obsn obsr obss off- offo offr offs ofno ofor oiii oins oion oios onir onis onni onno onon onor onos onso oobi ooff oofs oons oooo ooos oosi orbb orbi orbo orbs orff orfi orfs ori- orif orin orio oris orni orno orns oro- orof oron oror oros orri orro orrs orsi orso osii osin osis osno osnr osoi osoo osor osos osro ossb ossi osso rbbb rbbr rbbs rbis rbss rib- ribo ribs riff rifs riif riin riis rinf rinn rino rion rios riri rirs risi riso riss rnbr rnin rob- robb robi robo robs roff rofo roif roin roio roir rois roni rono rons roob roof rooi roon roor roos rori roro rosi roso ross rrif rrrr rsbi rsis rsnn rsno rsnr rsos s-ib s-ii s-os sbbs sbor sbsi sfio sfnb sfor sfos sfro sfss sibi sibo sibs siff sifo sifr sini sinn sino sins sion sior sios sirf siri siro sirr sirs sisi siss snib snir snns snob snoo snor snos snrs sobo sobr sobs sofi sofo soif soin soir sois son- soni sono sons soof soon soor soos sorb sori sorn soro sorr sors sosi soso soss srfi srib sris srni srnn srno sros ssbn ssbr ssin ssis ssns ssri ssrs sssb sssf sssi ssss