-ing bbbb bbin bbng bbrg bgun bibb bibi bigb bigg bign bigt bigu biin bin- bing bini binn bint binu birb birg biri birn birr birt biru bitt bitu bnib bnin bnrr brig brin brit brrr brug brun brut btrt bttb bubb bubi bubu bugg bugi buin buir buit buiu bunb bung buni bunn bunt bunu bur- burb burg buri burn burr burt buru but- buti butt ggbt gggg ggrn gibb gigg gigi gign ging gini ginn ginu girg giri girn girr girt giru giur gnib gnin gnit gnrr gnti grbr grib grig grin grit grni grrr grub grug grui grun grur grut gtbr gubb gubi gubu gugb gugg gugi gugu guib guin gung gunn gunt gurb gurg guri gurn gurr gurt guru guti gutt gutu ibri ibtb igni ignu igri iiii iiit iitr iitt inig init inni innr innu inri intg inti intn intr intu inui inun iri- irig irin irri irti irun itin itri itur iuiu n-ii nbti ngri ngtn ngur nguu nibi nigg nigt niir niit niiu ning nini nirt niru nitb niti nitr niur nngn nnit nnnn nntn ntnu ntru nttr ntui nubi nuin nuit nung nunn nunt nuri nurn nurr nurt nuru nutt nutu rbbb rbbr rgbi rgit rgtr rib- ribu rigg rigi rigu riin ring rinn riri riti ritt ritu rnbr rnin rnnt rnut rrrr rrun rubb rubi rubu rugg rugi ruin ruit rung runi runn runt ruri ruru ruti rutt rutu ruun tbit tbrb tibi tibu tigi tigr tiit tiiu ting tini tinn tint tinu tirb tiri tirr tiru titi titt titu tnut tri- trib trig trin trit trng trtr trub trug trun trut truu ttbb tttt tubb tubr tubu tugg tugu tuig tuin tuit tuiu tunb tung tuni tunn tunu turb turg turi turn turr turt turu tuti tutt tutu ubbi ubii ubir ubit uggt ugni ugri ugur uguu uint uirr ungu uni- unii unin unir unit unni untb unut urbi urgi urgu urib urin uriu urni urri urun urur urut utin utri utti uttu utug uuni uuri uuuu