-ene bbbb bbeb bbng bbrg bebb bebe beeb beeg been beer begg begu bene beng benn benu bere berg bern berr beru beur bgun bneg bner bnrr breb bree breg bren brer brrr brue brug brun bubb bube bubu buen buer bueu buge bugg bunb bune bung bunn bunu bur- burb bure burg burn burr buru ebbr eben eber ebru ebur eeee eeng eerg egbe egbu egee eger eggb egge egne egre enb- enbn enbr enee eneg ener enge engg engr enne ennu enue enur erbb erbe ereb eren erer erg- ergg erne erre erub erur euer euge eur- eure gebe geen geer gege gegg gen- gene geng genn genu gerb gere gern geru geue geun gggg ggrn gneu gnrr grbr greb gree greg gren greu grrr grub grue grug grun grur gubb gubu guen guer gugb guge gugg gugu gung gunn gurb gure gurg gurn gurr guru nber nebb nebe nebn nebr nebu neeb neen neer nege nene neng nenu nere nerr neru neue neun neur neuu ngen nger ngur nguu nngn nnnn nren nube nuee nuer nune nung nunn nure nurn nurr nuru rbbb rbbr rebb rebe rebu reeb reen rege regn regr regu rene reng renn renu rere rerg reru reue reuu rgbe rnbr rrrr rrun rubb rube rubu ruen ruer ruge rugg rune rung runn rure ruru ruun ubbe uber ugne ugur uguu unbe uneb unee unen uner ungu unne urbe ure- urge urgu urne urre urun urur uuen uuuu