bbbb bbfn bbin bibb bibi bibo biff bifi biin bin- bini binn bino bio- bioi bion birb biri birn biro birr bnib bnin bnor bnrr bobb bobi bobo boff boi- boii boin boni bonn bono boob boof boon boor bor- borf bori born boro borr brin brio brno brob bron broo bror brrr ffff ffii ffrr fiff fifi fifo fiii fini finn fino fion fior firn fofo foin fono foof foon for- forb fori forn foro forr frib frin frio frob fron i-no ibfi ibon ibri ibro ifbb ifni ifno ifnr ifor ifrb ifrf ifri iiii iiio iino iioi iioo inbo infi info inni inno innr ino- inoi inon inor inri inro iobi ioii ioio ioni ionn iono ioof iooi iooo iori iri- irin irio irob iron irri n-ii nbbo nfff nfib nfon nibi nibo niff niir nini nino nion nioo niro nnnn nobi nobo nofi noib noif noin noio noir non- noni nonn nono noo- noob noon nooo noor nor- norb norf nori norn noro norr nron obbo obin oboi obon obor obri obro off- offo offr ofno ofor oiii oion onir onni onno onon onor oobi ooff oooo orbb orbi orbo orff orfi ori- orif orin orio orni orno oro- orof oron oror orri orro rbbb rbbr rib- ribo riff riif riin rinf rinn rino rion riri rnbr rnin rob- robb robi robo roff rofo roif roin roio roir roni rono roob roof rooi roon roor rori roro rrif rrrr