-ene bbbb bbdd bbeb bblb bd-r bdle bebb bebe bede bedl bedu beeb beed beel been beer beld bele bell belu bend bene benn benu berd bere bern berr beru beur bldr bleb bled blee bleu blub blud blue blur bner bnrr breb bred bree brel bren brer brrr brud brue brun bubb bube bubu budb budd bude budl budu buel buen buer bueu bulb buld bule bull bulu bunb bund bune bunn bunu bur- burb burd bure burl burn burr buru dbnl dbrn dddd ddre ddub debe debu dedd dede dedu deeb deed deel deen deer deld dele dell dene denn denu der- derb dere dern derr deue deul deur dlbd dner dred dree drel dren drub drue druu dub- dubb dube dubu dudd dude dudu duel duer dule dull dulu dune dunn dure durn duru duul duur ebbr ebed ebel eben eber ebru ebul ebur edde ede- edel eden eder edle ednl edrn edru edun edur eede eedu eeee eele eend el-b elbe elbu elde eldr eled elee elen eler elle ellu elne elue elul enb- enbn enbr end- ende endu ened enee enel ener enne ennu enue enur erbb erbe erde ereb ered erel eren erer erld erle erll erne erre erub erur eude euer eule eur- eure lblr le-u lebd lebu lede leed leel leen leer lele lell lelu lend lene lenn lerd lere lern leud leun leur lldb lleu llll llud lndn lner lrdd lrne lrrr lube ludd lude lued luer lule lull lulu lund lune lunn lurd lure nber nddb ndde nder ndre nebb nebe nebn nebr nebu nedd nede nedu neeb need neel neen neer neld nele nell nend nene nenu nerd nere nerl nerr neru neue neun neur neuu nler nlrb nndb nnnn nren nrlb nrrd nrrl nube nubl nudd nude nuee nuel nuer nule null nune nunn nurd nure nurl nurn nurr nuru rbbb rbbr rble rder rebb rebe rebu redd rede redl redr redu reeb reed reel reen relb reld rele rell rend rene renn renu rerd rere reru reue reul reuu rlee rleu rnbr rnld rred rrle rrrr rrun rubb rube rubu rudd rude rudl rued ruel ruen ruer rule rull rund rune runn rurd rure ruru ruud ruun ubbe uber uble ubud udel uden uder udun uele uell uend ulde uleb ulee ulen ulle ullr ulne ulul unbd unbe unde uneb uned unee unen uner unle unne urbe urde urdu ure- ured urle urne urre urun urur uuen uulu uuuu