bbbb bbin bbox bibb bibi bibo biin bin- bini binn bino bint bio- bioi bion biot biox birb biri birn biro birr birt birx bito bitt bitx bixi bnib bnin bnor bnrr bobb bobi bobo boi- boii boin boit boni bonn bono bont boob boon boor boot boox bor- bori born boro borr bort botb boti botn boto bott brin brio brit brix brno brob bron broo bror brot brox brrr btob btor btrt bttb i-no ibon ibot ibox ibri ibro ibtb iiii iiio iiit iino iioi iioo iitr iitt inbo init inni inno innr ino- inoi inon inor inot inox inri inro inti intn into intr iobi ioii ioio ioit ioni ionn iono iooi iooo iori ioto iri- irin irio irix irob iron irri irti itin itno itoi iton itoo itor itri itto ixxi n-ii nbbo nbti nibi nibo niir niit nini nino nion nioo niro nirt nitb niti nito nitr nixi nixt nnit nnnn nnot nntn nobi nobo noib noin noio noir noit noix non- noni nonn nono nont nonx noo- noob noon nooo noor noot nor- norb nori norn noro norr nort not- noti noto nott nron ntto nttr obbo obin obit obix oboi obon obor obot obox obri obro oiii oint oion oirt oiti onir onit onix onni onno onon onor ont- onti onto oobi oont oooo oort ootb orbb orbi orbo ori- orin orio orit orix orni orno oro- oron oror orot orri orro orto otin otit oto- oton otoo otor otro otti otto oxi- oxo- oxon oxox oxxo rbbb rbbr rib- ribo riin rinn rino rion riot riri riti rito ritt rixo rnbr rnin rnnt rnot rob- robb robi robo robt roin roio roir roit roni rono ront roob rooi roon roor root roox rori roro rort roti rotn roto rotr rott roxo rrrr tbit tbox tbrb tibi tiit tini tinn tino tint tion tirb tiri tiro tirr titi tito titt tixt tobi tobo tobt toit tonb toni tonn tono toon toor toot tori torn toro torr tort torx toti toto totr tott tox- toxi toxo toxt tri- trib trin trio trit trix trno troi tron troo trot trox trtr ttbb tton tttt txii txtr xbin xbox xibo xiii xion xito xixi xorn xoro xoxo xtro xxii xxix xxxi xxxo xxxx