-ene bbbb bbdd bbeb bbfn bd-r bebb bebe bede beeb beed beef been beer befe beff bend bene benn berd bere bern berr bner bnrr breb bred bree bref bren brer brrr dbrn dddd ddre debe dedd dede deeb deed deef deen deer defe deff defn dene denn der- derb dere derf dern derr dfer dfrf dner dred dree dref dren ebbr ebed eben eber edde ede- eden eder edrn eede eeee eefe eefn eend efbr efen enb- enbn enbr end- ende ened enee ener enfb enne erbb erbe erde erdf ereb ered eren erer erne erre fede fedn feeb feed feen feer fefe feff fend fene fenn ferb ferd fere fern ferr ffee ffff ffrr fndd fndn fndr fred free fren nber nddb ndde nder ndre ndrf nebb nebe nebn nebr nedd nede neeb need neef neen neer nefd nefe neff nend nene nerd nere nerf nerr nfer nfff nndb nnnn nren nrrd rbbb rbbr rder rebb rebe redd rede redr reeb reed reef reen refd refe reff refn refr rend rene renn rerd rere rfef rnbr rndf rred rrrr