bbbb bbin bibb bibi bibo biin bin- bini binn bino bint bio- bioi bion biot bito bitt bnib bnin bobb bobi bobo boi- boii boin boit boni bonn bono bont boob boon boot botb boti botn boto bott btob bttb i-no ibon ibot ibtb iiii iiio iiit iino iioi iioo iitt inbo init inni inno ino- inoi inon inot inti intn into iobi ioii ioio ioit ioni ionn iono iooi iooo ioto itin itno itoi iton itoo itto n-ii nbbo nbti nibi nibo niit nini nino nion nioo nitb niti nito nnit nnnn nnot nntn nobi nobo noib noin noio noit non- noni nonn nono nont noo- noob noon nooo noot not- noti noto nott ntto obbo obin obit oboi obon obot oiii oint oion oiti onit onni onno onon ont- onti onto oobi oont oooo ootb otin otit oto- oton otoo otti otto tbit tibi tiit tini tinn tino tint tion titi tito titt tobi tobo tobt toit tonb toni tonn tono toon toot toti toto tott ttbb tton tttt