bbbb bbbs bbdd bbdo bbox bd-r bdii bdos bdsd bibb bibi bibo bibs bidi bido bidr bids bidx biis bio- bioi bios biox birb bird biri biro birr birs birx bis- bisd biso biss bixi bobb bobi bobo bobs bodb bodi bodo bods boi- boid boii bois boob bood boor boos boox bor- bord bori boro borr bors bosi boso boss brdo brds brid brio bris brix brob brod broo bror bros brox brrr brrs brsb brsr bsbd bsix bsod bsos bsrd bssd d-bo d-ix dbos dbrs dbss dddd ddss dibb dibo dibs didi dido dids diii diis dior dios dird dirr dirs dis- disd disi diso diss dixi do-x dobb dobi dobs dod- dodd dodi dodo dods doid dois doix doob dood door doos dord dori doro dorr dors dosi doso doss drib drix drob drod drrs dsdr dsos dsri dsrr dssi dxbr dxdr dxds dxii dxix dxrd dxrr dxrx dxss dxxr dxxx ibdo ibid ibis ibos ibox 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 irix irob irod irri irrs isbd isbx isdb isds isis iso- isor isos isri issi isso issr isss ixos ixxi obbo obid obis obix oboi obor obos obox 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 orix oro- oror oros orri orro orrs orsi orso osdi osii osis osoi osoo osor osos osrd osro ossb ossd ossi osso oxi- oxid oxis oxo- oxos oxox oxsi oxxo rbbb rbbr rbbs rbds rbis rbsd rbss rdio rdos rdso rib- ribo ribs ridd ridi rido rids ridx riis rios riri rirs risd risi riso riss rixo rob- robb robi robo robs rodd rodi rodo rods roid roio roir rois roob rood rooi roor roos roox rori roro rosi roso ross roxo 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 siox siri siro sirr sirs sisd sisi siss sixo sixx sobo sobr sobs sodd sodo sods soir sois sood soor soos sorb sord sori soro sorr sors sosi soso soss soxs srib sris sros srsd ssbr ssdd ssid ssis ssri ssrs sssb sssi ssss xbox xdos xibo xidi xiii xisi xixi xois xoro xors xoxo xrdb xrds xrod xxii xxix xxxi xxxo xxxx