bbbb bbbs bbdd bbdo bdii bdos bdsd bibb bibi bibo bibs bidi bido bids biis bio- bioi bios bis- bisd biso biss bivi bobb bobi bobo bobs bodb bodi bodo bods boi- boid boii bois boob bood boos bosi boso boss bovi bovo bsbd bsod bsos bssd bvds d-bo dbos dbss dddd ddss dibb dibo dibs didi dido dids diii diis diiv dios dis- disd disi diso diss divd divi divo divs dobb dobi dobs dod- dodd dodi dodo dods doid dois doob dood doos dosi doso doss dovi dsos dssi dsvd dvbs dvds dvi- dvii ibdo ibid ibis ibos ibss iddo idid idio idis idos idso idss idvd iiii iiio iiis iioi iioo iios iisd iisi iobi iod- iodd iodo ioii ioio iooi iooo ioos ioso isbd isdb isds isis iso- isos issi isso isss ivbv ivod obbo obid obis oboi obos obsd obss obvi obvs odbo oddd oddi odds odio odis odoo odos odso oido oids oiii oios oisd oobi oodi ooid oooo ooos oosi osdi osdv osii osis osoi osoo osos osov ossb ossd ossi osso ovi- ovid ovis ovo- ovod ovoo s-ib s-ii s-iv s-os sbbs sbds sbsd sbsi sdds sdib sdio sdss sibi sibo sibs sidd sidi sido sids siod sios sisd sisi siss sivi sobo sobs sodd sodo sods sois sood soos sosi soso soss sosv sovo sovs ssdd ssid ssis sssb sssi ssss svdo svod vdio vdsi vdso vibs vidi vido vids viii vios visd visi viso viss vivi vivo vodo void voio vois vosi voso voss vvob vvsb vvvv