bbbb bbbs bbdd bbdo bd-r bdii bdos bdsd bibb bibi bibo bibs bidi bido bidr bids biis bio- bioi bios birb bird biri biro birr birs bis- bisd biso biss bobb bobi bobo bobs bodb bodi bodo bods boi- boid boii bois boob bood boor boos bor- bord bori boro borr bors bosi boso boss brdo brds brid brio bris brob brod broo bror bros brrr brrs brsb brsr bsbd bsod bsos bsrd bssd d-bo dbos dbrs dbss dddd ddss dibb dibo dibs didi dido dids diii diis dior dios dird dirr dirs dis- disd disi diso diss dobb dobi dobs dod- dodd dodi dodo dods doid dois doob dood door doos dord dori doro dorr dors dosi doso doss drib drob drod drrs dsdr dsos dsri dsrr dssi ibdo ibid ibis ibos ibrd ibri ibro ibss iddo idid idio idir idis idos idro idso idss iiii iiio iiis iioi iioo iios iirs iisd iisi iisr iobi iod- iodd iodo ioii ioio iooi iooo ioos iori iors ioso irdo irds iri- irid irio iris irob irod irri irrs isbd isdb isds isis iso- isor isos isri issi isso issr isss obbo obid obis oboi obor obos obri obro obsd obsr obss odbo oddd oddi odds odio odir odis odoo odor odos odso oido oids oiii oios oisd oobi oodi ooid oooo ooos oord oosi orbb orbi orbo orbs ordo ords ori- orid orio oris oro- oror oros orri orro orrs orsi orso osdi osii osis osoi osoo osor osos osrd osro ossb ossd ossi osso rbbb rbbr rbbs rbds rbis rbsd rbss rdio rdos rdso rib- ribo ribs ridd ridi rido rids riis rios riri rirs risd risi riso riss rob- robb robi robo robs rodd rodi rodo rods roid roio roir rois roob rood rooi roor roos rori roro rosi roso ross rrrr rsbi rsdd rsds rsid rsis rsos s-ib s-ii s-os sbbs sbds sbor sbsd sbsi sdds sdib sdio sdrs sdss sibi sibo sibs sidd sidi sido sidr sids siod sior sios siri siro sirr sirs sisd sisi siss sobo sobr sobs sodd sodo sods soir sois sood soor soos sorb sord sori soro sorr sors sosi soso soss srib sris sros srsd ssbr ssdd ssid ssis ssri ssrs sssb sssi ssss