bbbb bbfn bbin bftt bibb bibi bibo biff bifi biin bin- bini binn bino bint bio- bioi bion biot birb biri birn biro birr birt bito bitt bnib bnin bnor bnrr bobb bobi bobo boff boi- boii boin boit boni bonn bono bont boob boof boon boor boot bor- borf bori born boro borr bort botb boti botn boto bott brin brio brit brno brob bron broo bror brot brrr btob btor btrt bttb ffff ffii ffrr fftf fiff fifi fifo fift fiii fini finn fino fint fion fior firn fiti fitt fntb fobt fofo foin fono font foof foon foot for- forb fori forn foro forr fort foti foto fott frib frin frio frit frob fron frot ftii i-no ibfi ibon ibot ibri ibro ibtb ifbb ifit ifni ifno ifnr ifor ifrb ifrf ifri iftn ifto iiii iiio iiit iino iioi iioo iitr iitt inbo infi info init inni inno innr ino- inoi inon inor inot inri inro inti intn into intr iobi ioii ioio ioit ioni ionn iono ioof iooi iooo iori iotf ioto iri- irin irio irob iron irri irtf irti itif itin itno itof itoi iton itoo itor itrf itri ittf itto n-ii nbbo nbti nfff nfib nfon nfto nibi nibo niff nift niir niit nini nino nion nioo niro nirt nitb nitf niti nito nitr nnit nnnn nnot nntn nobi nobo nofi noib noif noin noio noir noit non- noni nonn nono nont noo- noob noon nooo noor noot nor- norb norf nori norn noro norr nort not- noti noto nott nron ntof ntto nttr obbo obin obit oboi obon obor obot obri obro off- offo offr ofit ofno ofor oiii oint oion oirt oiti onir onit onni onno onon onor ont- onti onto oobi ooff oont oooo oort ootb orbb orbi orbo orff orfi ori- orif orin orio orit orni orno oro- orof oron oror orot orri orro orto otif otin otit oto- otof oton otoo otor otro otti otto rbbb rbbr rib- ribo riff rift riif riin rinf rinn rino rion riot riri riti rito ritt rnbr rnin rnnt rnot rob- robb robi robo robt roff rofo roif roin roio roir roit roni rono ront roob roof rooi roon roor root rori roro rort roti rotn roto rotr rott rrif rrrr rtbf rtfb tbit tbnf tbrb tfin tfot tibi tiff tifo tift tiit tini tinn tino tint tion tirb tiri tiro tirr titi tito titt tobi tobo tobt toff tofi tofo toft toit tonb toni tonn tono toof toon toor toot torf tori torn toro torr tort toti toto totr tott trfr tri- trib trif trin trio trit trno troi tron troo trot trtr ttbb ttff ttfn tton tttt