-ing bbbb bbin bbng bbpr bbrg bgun bibb bibi bigb bigg bign bigu biin bin- bing bini binn binu bipp bipu birb birg biri birn birr biru bnib bnin bnpp bnrr brig brin brrr brug brun brup bubb bubi bubu bugg bugi buin buir buiu bunb bung buni bunn bunu bur- burb burg buri burn burp burr buru gggg ggrn gibb gigg gigi gign ging gini ginn ginu gipi gipp girg giri girn girr giru giur gnib gnin gnip gnrr gpgp gpip gprp grbr grib grig grin grip 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 inp- inpi inpp inri inui inun inup ipin ippr ipri ipur irbp iri- irig irin irip irri irun iuiu iupp n-ii n-up nbpp ngri ngur nguu nibi nigg niip niir niiu ning nini nipr niru niur nngn nnnn nnpi nnpr npin npri nrpn nubi nuin nung nunn nuri nurn nurp nurr nuru pgib pgpu pgup pibb pibi pigb pigg pign pigp pigu piip ping pini pinn pinp pinu pipi pipp pirg piri pirn pirr piru pnin pnpp pnup ppgi ppib ppig pppn pppp ppru ppur pri- prig prii prin prnp prri pruu pubu pugu puig puin puir puiu pung punu pupi pupu pur- purb purg puri purp purr puru rbbb rbbr rgbi rib- ribu rigg rigi rigu riin ring rinn ripi ripp ripr riri rnbr rnin rpii rppn rrrr rrun rubb rubi rubp rubu rugg rugi ruin rung runi runn rupp ruri rurp ruru ruun u-rp ubbi ubii ubir ugni ugri ugur uguu uipi uirr ungp ungu uni- unii unin unir unni upin upnp uppp uppu upri upup urbi urgi urgu urib urin uriu urni urri urun urup urur uuni uuri uuuu