bbbb bbin bibb bibi bibo biin bin- bini binn bino bint binu bio- bioi bion biot biou birb biri birn biro birr birt biru bito bitt bitu bnib bnin bnor bnrr bobb bobi bobo bobu boi- boii boin boit boiu boni bonn bono bont bonu boob boon boor boot bor- bori born boro borr bort boru botb boti botn boto bott boun bour bout brin brio brit brno brob bron broo bror brot brou brrr brun brut btob btor btrt bttb bubb bubi bubo bubu buin buir buit buiu bunb buni bunn buno bunt bunu buon bur- burb buri burn buro burr burt buru but- buti buto butt i-no ibon ibot ibri ibro ibtb iiii iiio iiit iino iioi iioo iitr iitt inbo init inni inno innr innu ino- inoi inon inor inot inou inri inro inti intn into intr intu inui inun iobi ioii ioio ioit ioni ionn iono iooi iooo iori ioto ioun iri- irin irio irob iron irri irti irun itin itno itoi iton itoo itor itou itri itto itur iuiu iuno n-ii nbbo nbti nibi nibo niir niit niiu nini nino nion nioo niou niro nirt niru nitb niti nito nitr niur nnit nnnn nnot nntn nobi nobo nobu noib noin noio noir noit non- noni nonn nono nont nonu noo- noob noon nooo noor noot nor- norb nori norn noro norr nort not- noti noto nott noun nour nout nron ntnu ntru ntto nttr ntui nubi nuin nuit nunn nuno nunt nuon nuri nurn nurr nurt nuru nutt nutu obbo obin obit oboi obon obor obot obri obro oiii oint oion oirt oiti onir onit onni onno onon onor ont- onti onto onur onut oobi oont oooo oort ootb orbb orbi orbo orbu ori- orin orio orit orni orno oro- oron oror orot orri orro orto orub otin otit oto- oton otoo otor otro otti otto ottu otur ouii ouin ouir ouit oun- our- ourn ouro ourt out- outb outi outo ouu- rbbb rbbr rib- ribo ribu riin rinn rino rion riot riou riri riti rito ritt ritu rnbr rnin rnnt rnot rnut rob- robb robi robo robt robu roin roio roir roit roiu roni rono ront roob rooi roon roor root rori roro rort roru roti rotn roto rotr rott roub roun rout rrrr rrun rubb rubi rubu ruin ruit runi runn runo runt ruri ruro ruru ruti ruto rutt rutu ruun tbit tbrb tibi tibu tiit tiiu tini tinn tino tint tinu tion tiou tirb tiri tiro tirr tiru titi tito titt titu tnut tobi tobo tobt tobu toit tonb toni tonn tono tonu toon toor toot tori torn toro torr tort toru toti toto totr tott toui toun tour tout tri- trib trin trio trit trno troi tron troo trot trou trtr trub trun trut truu ttbb tton tttt tubb tubo tubr tubu tuin tuit tuiu tunb tuni tunn tuno tunu tuor turb turi turn turo turr turt turu tuti tuto tutt tutu tuuo ubbi ubbo ubii ubir ubit ubon uint uirr uni- unii unin unio unir unit unni unno unon unro untb unto unut uor- urbi urib urin uriu urni uro- uroo urri urun urur urut utin utor utri utti utto uttu uuni uuno uuri uuuu