-ing bbbb bbin bbng bbrg bgun bibb bibi bigb bigg bign bigu biin bin- bing bini binn binu birb birg biri birn birr biru bnib bnin bnrr brig brin brrr brug brun bubb bubi bubu bugg bugi buin buir buiu bunb bung buni bunn bunu bur- burb burg buri burn burr buru gggg ggrn gibb gigg gigi gign ging gini ginn ginu girg giri girn girr giru giur gnib gnin gnrr grbr grib grig grin grni grrr grub grug grui grun grur gubb gubi gubu gugb gugg gugi gugu guib guin gung gunn gurb gurg guri gurn gurr guru ibri igni ignu igri iiii inig inni innr innu inri inui inun iri- irig irin irri irun iuiu n-ii ngri ngur nguu nibi nigg niir niiu ning nini niru niur nngn nnnn nubi nuin nung nunn nuri nurn nurr nuru rbbb rbbr rgbi rib- ribu rigg rigi rigu riin ring rinn riri rnbr rnin rrrr rrun rubb rubi rubu rugg rugi ruin rung runi runn ruri ruru ruun ubbi ubii ubir ugni ugri ugur uguu uirr ungu uni- unii unin unir unni urbi urgi urgu urib urin uriu urni urri urun urur uuni uuri uuuu