bbbb bbfn bbin bfpo bfpp bibb bibi bibo biff bifi biin bin- bini binn bino bio- bioi bion bipp bnib bnin bnpp bobb bobi bobo boff boi- boii boin boni bonn bono boob boof boon boop bopp fbop ffff ffii fibp fiff fifi fifo fiii fini finn fino finp fion fipp fofo foin fono foof foon fopp fpin i-no ibfi ibon ifbb ifni ifno ifpo iiii iiio iino iioi iioo iiop iipf inbo infi info infp inni inno ino- inoi inon inp- inpi inpp iobi ioii ioio ioni ionn iono ioof iooi iooo ipin ipop ippf ippo n-ii nbbo nbpp nfff nfib nfip nfon nibi nibo niff niip nini nino nion nioo nnnn nnpi nobi nobo nofi noib noif noin noio non- noni nonn nono noo- noob noon nooo noop npif npin obbo obin oboi obon off- offo ofno oiii oion onni onno onon oobi ooff oooo opii opin opio opo- opon oppi oppo pfff pibb pibi piff piip pini pinn pino pinp piob pion pipi pipo pipp pnin pnon pnpo pnpp pobo poff pofi poin poio poni pono ponp poof poon poop pop- popi popo popp ppib ppif pppn pppo pppp