bbbb bbfn bbin bibb bibi bibo biff bifi biin bin- bini binn bino bio- bioi bion bnib bnin bobb bobi bobo boff boi- boii boin boni bonn bono boob boof boon ffff ffii fiff fifi fifo fiii fini finn fino fion fofo foin fono foof foon i-no ibfi ibon ifbb ifni ifno iiii iiio iino iioi iioo inbo infi info inni inno ino- inoi inon iobi ioii ioio ioni ionn iono ioof iooi iooo n-ii nbbo nfff nfib nfon nibi nibo niff nini nino nion nioo nnnn nobi nobo nofi noib noif noin noio non- noni nonn nono noo- noob noon nooo obbo obin oboi obon off- offo ofno oiii oion onni onno onon oobi ooff oooo