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 bivi 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 bovi bovo brdo brds brid brio bris brob brod broo bror bros brrr brrs brsb brsr brvi bsbd bsod bsos bsrd bssd bvds d-bo dbos dbrs dbss dddd ddss dibb dibo dibs didi dido dids diii diis diiv dior dios dird dirr dirs dis- disd disi diso diss divd divi divo divs dobb dobi dobs dod- dodd dodi dodo dods doid dois doob dood door doos dord dori doro dorr dors dosi doso doss dovi drib drob drod drrs dsdr dsos dsri dsrr dssi dsvd dvbs dvdr dvds dvi- dvii dvir dvor dvrs dvsr ibdo ibid ibis ibos ibrd ibri ibro ibss iddo idid idio idir idis idos idro idso idss idvd 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 irov irri irrs irvs isbd isdb isds isis iso- isor isos isri issi isso issr isss ivbv ivdr ivod ivor ivrs obbo obid obis oboi obor obos obri obro obsd obsr obss obvi obvs 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 orvr orvs osdi osdv osii osis osoi osoo osor osos osov osrd osro ossb ossd ossi osso ovi- ovid ovis ovo- ovod ovoo rbbb rbbr rbbs rbds rbis rbsd rbss rdio rdos rdso rdvs rib- ribo ribs ridd ridi rido rids riis rios riri rirs risd risi riso riss rivo rivs rob- robb robi robo robs rodd rodi rodo rods roid roio roir rois roob rood rooi roor roos rori roro rosi roso ross rovi rovo rovs rrrr rsbi rsdd rsds rsid rsis rsos s-ib s-ii s-iv 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 sivi sobo sobr sobs sodd sodo sods soir sois sood soor soos sorb sord sori soro sorr sors sosi soso soss sosv sovo sovs srib sris sros srsd ssbr ssdd ssid ssis ssri ssrs sssb sssi ssss svdo svir svod svor vdio vdsi vdso vibs vidi vido vids viii vios virb viri viro virr visd visi viso viss vivi vivo vodo void voio voir vois voor vor- vord vori voro vors vosi voso voss vrdi vrio vris vrsi vvob vvsb vvvv