-ing bbbb bbin bbng bbrg bgon bgun bibb bibi bibo bigb bigg bign bigo bigu biin bin- bing bini binn bino binu bio- biog bioi bion biou birb birg biri birn biro birr biru bnib bnin bnor bnrr bobb bobi bobo bobu bogg bogi bogo boi- boii boin boiu bong boni bonn bono bonu boob boog boon boor bor- borg bori born boro borr boru boun bour brig brin brio brno brob brog bron broo bror brou brrr brug brun bubb bubi bubo bubu bugg bugi bugo buin buir buiu bunb bung buni bunn buno bunu buon bur- burb burg buri burn buro burr buru gbbo gbon gggg ggrn gibb gigg gigi gign gigo ging gini ginn gino ginu giog gioi gion girg giri girn giro girr giru giur gnib gnin gnoo gnrr gobi gobo gogi gogo goin gon- gong goni gonn gono gonu goog gooi goon goor gorb gorg gori gorn goro gorr gou- goug goun gour grbr grib grig grin grni grob grog groi gron groo gror grou grrr grub grug grui grun grur gubb gubi gubu gugb gugg gugi gugu guib guin gung gunn gurb gurg guri gurn guro gurr guru i-go i-no ibon ibri ibro igbo igni igno ignu igon igoo igor igri iiii iiio iino iioi iioo inbo ingo inig inni inno innr innu ino- inoi inon inor inou inri inro inui inun iobi ioii ioio ioni ionn iono iooi iooo iorg iori ioug ioun iri- irig irin irio irob iron irri irun iuiu iuno n-ii nbbo ngio ngon ngor ngou ngri ngur nguu nibi nibo nigg nigo niir niiu ning nini nino niog nion nioo niou niro niru niur nngn nnnn nobi nobo nobu nogg nogo noib noin noio noir non- nong noni nonn nono nonu noo- noob noon nooo noor nor- norb norg nori norn noro norr noun nour nron nubi nuin nung nunn nuno nuon nuri nurn nurr nuru obbo obin oboi obon obor obri obro ogb oggi ogin ogni ogog ogoi ogon ogou ogri ogro ogui ogun oigo oiii oion ongi ongo ongu onir onni onno onon onor onur oobi oooo orbb orbi orbo orbu orgn orgo ori- orig orin orio orni orno oro- oron oror orri orro orub ouii ouin ouir oun- oung our- ourn ouro ouu- rbbb rbbr rgbi rib- ribo ribu rigg rigi rigo rigu riin ring rinn rino rion riou riri rnbr rnin rob- robb robi robo robu rogg rogi rogo roig roin roio roir roiu rong roni rono roob roog rooi roon roor rori roro roru roub roun rrrr rrun rubb rubi rubu rugg rugi ruin rung runi runn runo ruri ruro ruru ruun ubbi ubbo ubii ubir ubon uggo ugni ugri ugro ugur uguu uirr ungo ungu uni- unii unin unio unir unni unno unon unro uor- urbi urgi urgu urib urin uriu urni uro- uroo urri urun urur uuni uuno uuri uuuu