bbbb bbbs bbeb bblb bbls bebb bebe beeb beek beel beer bees beke beks bele belk bell bels belu bere berk berr bers beru bes- bese besk bess beuk beur bleb blee blek bles bleu blkb blls blss blub blue blur blus breb bree brek brel brer bres brkb brls brrr brrs brsb brsr brue brus bseb bsee bser bses bsse bubb bube bubs bubu buel buer bueu buke bukk buku bulb bule bulk bull buls bulu bur- burb bure burk burl burr burs buru buse busk buss busu buus ebbr ebbs ebel eber ebes ebru ebul ebur ebus eeee eees eeke eeks eele eels eers eese eesk ekeb ekek eker ekes ekur el-b elbe elbu elee elek eler eles elke elks elle ells ellu else elsu elue elul elus erbb erbe ereb erel erer eres erke erks erle erll erre errs erse erub erur erus esbs esee esek esel eser eses eske esks esku esse essl essu esus euer eule eur- eure euse kbbb kbbe kbbk kbbl kbbr kbbs kbbu kbeb kbee kbek kbel kber kbes kbkb kbkk kbkl kbkr kblb kble kbll kblr kbls kblu kbrb kbre kbrk kbrl kbru kbsb kbsk kbsr kbss kbsu kbub kbue kbuk kbul kbur kbus kbuu kebb kebe kebr kebu keek keel keer kees kekb keke kekl keks keku kele kelk kell kelu ker- kerb kere kerk kerl kerr kers keru kesb kesk kesr kess keul keur keus kkbb kkbe kkbl kkbr kkbs kkkk kklb kkll kkls kkrb kkre kkrk kkrl kkrr kkrs kkse kksr kkss kksu kkus kkuu klbb klbe klbl klbs klbu kleb klee klek kler kles klkk klkl klkr klks kllb klle kllk klls klrk klrr klrs klru klse klsr klsu klub klue kluk klur kluu krbb krbe krbk krbl krbr kreb kree krek kres kreu krke krkk krkr krks krku krle krrb krre krrk krrl krrr krrs krse krsk krsl krsr krss krsu krue kruk krul krur ksbl ksbr ksbs ksee ksek ksel kser kskb kske kskk kskr ksks ksku kslb ksle kslk ksll kslr kslu ksrb ksrr ksrs ksse kssl kssr ksss kssu ksub ksue ksuu kubb kube kubr kubs kubu kuek kuel kues kueu kuke kukk kukl kuks kuku kulb kule kull kulu kurb kure kurk kurl kurr kurs kuru kusb kusu kuub kuuk kuul kuur kuuu lblr lbrs le-u lebu leek leel leer lees leke lekk leks lele lell lelu lere lerk lese lesk less lesu leuk leur lkrs llbs lles lleu llks llll lrrr lrse ls-r lsbu lses lssr lube lubs luer lues luke lule lull lulu lure lurk lurs luse lusk luss luuk rbbb rbbr rbbs rble rbsl rbss rebb rebe rebk rebs rebu reeb reek reel rees reke reks relb rele rell rels rere rers reru rese ress reue reuk reul reus reuu rkss rlee rleu rlls rrle rrrr rsee rsre rssl rubb rube rubs rubu ruel ruer rues ruke rukk ruku rule rulk rull rure rurs ruru ruse rusk russ rusu sbbs sber sbrk sbse sbus se-e se-k se-s se-u sebe sebs seeb seek seel seer sees seeu seke sekk seku selb sele selk sell sels selu serb sere serk serr sers seru sese sess seul seur skee skel sker skes skss skue skul skur sleb slee sler sles slre slrs slsu slub slue slur sreb sres srub ssbr ssee sses ssle ssrl ssrs sssb ssss sub- subb subl subs suee suel suer sues sueu suke suks suku sul- sule sulk sull sulu sur- sure surr surs suru sus- suse susk suss susu suus ubbe ubek uber uble ubls uele uell uers uess ukek ukes ukeu ukur uleb ulee ulek ules ulle ullr uluk ulul ulus urbe urbs ure- ures urke urle urls urre urse urss ursu uruk urur urus us-k usbe usbl usbr usbs usee usel user uses uske usle uslu ussb usse ussr usss ussu usul usus uulu uuuu