-ing bbbb bbin bbng bbpr bbrg bgon bibb bibi bibo bigb bigg bign bigo biin bin- bing bini binn bino bio- biog bioi bion bipp birb birg biri birn biro birr bnib bnin bnor bnpp bnrr bobb bobi bobo bogg bogi bogo boi- boii boin bong boni bonn bono boob boog boon boop boor bopp bor- borg bori born boro borr brig brin brio brno brob brog bron broo bror brrr gbbo gbon gggg ggpo ggrn gibb gigg gigi gign gigo ging gini ginn gino giog gioi gion giop gipi gipp girg giri girn giro girr gnib gnin gnip gnoo gnrr gobi gobo gogi gogo goin goip gon- gong goni gonn gono goog gooi goon goop goor gopi gopo gorb gorg gori gorn goro gorp gorr gpgp gpip gprp grbr grib grig grin grip grni grob grog groi gron groo grop gror grrr i-go i-no ibon ibri ibro igbo igni igno igon igoo igor igri iiii iiio iino iioi iioo iiop inbo ingo inig inni inno innr ino- inoi inon inor inp- inpi inpp inri inro iobi ioii ioio ioni ionn iono iooi iooo iorg iori ipin ipop ippo ippr ipri irbp iri- irig irin irio irip irob iron irop irri n-ii nbbo nbpp ngio ngon ngor ngri nibi nibo nigg nigo niip niir ning nini nino niog nion nioo nipr niro nngn nnnn nnpi nnpr nobi nobo nogg nogo noib noin noio noir non- nong noni nonn nono noo- noob noon nooo noop noor nor- norb norg nori norn noro norr npin npri nron nrpn obbo obin oboi obon obor obri obro ogb oggi ogin ogni ogog ogoi ogon ogri ogro oigo oiii oion ongi ongo onir onni onno onon onor onpg oobi oooo opii opin opio opng opo- opon opor oppi oppo orbb orbi orbo orgn orgo ori- orig orin orio orni orno oro- oron oror orpi orri orro pgib pibb pibi pigb pigg pign pigo pigp piip ping pini pinn pino pinp piob pion pipi pipo pipp pirg piri pirn piro pirr pnin pnon pnpo pnpp pnro pobo pogg pogo poin poio pong poni pono ponp poon poop poor pop- popi popo popp porb porg pori porn poro porr ppgi ppib ppig pppn pppo pppp pri- prig prii prin prnp pro- prob prog pron proo prop prri rbbb rbbr rgbi rib- ribo rigg rigi rigo riin ring rinn rino rion ripi ripp ripr riri rnbr rnin rob- robb robi robo rogg rogi rogo roig roin roio roir rong roni rono roob roog rooi roon roop roor ropo rori roro rpii rpob rpon rppn rrrr