bbbb bbbs bbeb bblb bbls bbrc bcbc bcbs bccc bccl bccs bcec bcer bces bcrs bcru bcsc bcsl bcss bcuc bebb bebe beck becs becu beeb beek beel beer bees beke beks bele belk bell bels belu berc bere berk berr bers beru bes- bese besk bess beuk beur blcu bleb blee blek bles bleu blkb blls blrc blss blub blue blur blus brcb brce breb brec bree brek brel brer bres brkb brls brrr brrs brsb brsr bruc brue brus bscs bseb bsec bsee bser bses bslc bssc bsse bubb bube bubs bubu bucc buce buck bucs bucu buel buer bueu buke bukk buku bulb bule bulk bull buls bulu bur- burb bure burk burl burr burs buru busc buse busk buss busu buus cbbc cbbs cbcc cbce cbcl cbcr cbcs cbcu cbec cbee cber cbkl cbkr cblb cblc cbre cbrl cbsc cbse cbus ccbc cccb cccc cccl cccs cccu ccee ccel cclc ccls ccrc ccre ccrl ccrs ccsl ccss ccuc ccus cebs cebu cec- cece cecs ceeb ceec ceel cees ceke cel- celc cele cell cels cer- cerc cere cerl cers cesc cese cesr cess ckbc ckbe ckck ckcl ckcs cker ckrc cksb cksl clec clee clek cler cles cleu clrs clsc club clue crbc crbu crcc crce crcr cre- creb crec cree cres creu crkc crkl crls crss crub crue cruk crus cscb cscc csce cscl cscr cscs csec csee cser csks cslr cslu csrc csrs csse cssr csur csus cub- cubb cube cubs cucc cuce cuck cuek cuer cues cuk- cuke culb culc cule culk cull culs curb cure curl curr curs cusb cusk cuss cusu e-cl ebbc ebbr ebbs ebcc ebel eber ebes ebru ebul ebur ebus ecbc ecbe eccb eccc ecce eccl eces ecks ecrc ecrl ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eeke eeks eele eels eerc eers eese eesk ekeb ekek eker ekes ekur el-b elbe elbu elcb elce elec elee elek eler eles elke elks elle ells ellu else elsu elue elul elus erbb erbe ercc erce ereb erec erel erer eres erke erks erle erll errc erre errs erse erub eruc erur erus esbs escb esce escr escs escu esee esek esel eser eses eske esks esku esse essl essu esus eubc euer eule eur- eurc eure euse kbbb kbbc kbbe kbbk kbbl kbbr kbbs kbbu kbcb kbce kbck kbcl kbcr kbcs kbcu kbeb kbec kbee kbek kbel kber kbes kbkb kbkk kbkl kbkr kblb kble kbll kblr kbls kblu kbrb kbrc kbre kbrk kbrl kbru kbsb kbsk kbsr kbss kbsu kbub kbuc kbue kbuk kbul kbur kbus kbuu kcbc kcbk kcbl kcbr kcbs kcbu kccb kccc kcck kccl kccr kccu kceb kcec kcee kcel kceu kckc kckk kckl kckr kclc kcle kclk kcll kclr kcls kclu kcrc kcrr kcrs kcru kcsb kcsc kcse kcsr kcss kcsu kcub kcue kcuk kcul kebb kebc kebe kebr kebu keck kecr keek keel keer kees kekb kekc keke kekl keks keku kele kelk kell kelu ker- kerb kerc kere kerk kerl kerr kers keru kesb kesc kesk kesr kess keul keur keus kkbb kkbe kkbl kkbr kkbs kkcb kkck kkcl kkcr kkcs kkkk kklb kklc kkll kkls kkrb kkrc kkre kkrk kkrl kkrr kkrs kkse kksr kkss kksu kkus kkuu klbb klbc klbe klbl klbs klbu klcb klcc klce klck klcl klcr klcs kleb klec klee klek kler kles klkc klkk klkl klkr klks kllb kllc klle kllk klls klrc klrk klrr klrs klru klsc klse klsr klsu klub klue kluk klur kluu krbb krbe krbk krbl krbr krcb krcc krce krcl krcs krcu kreb krec kree krek kres kreu krkc krke krkk krkr krks krku krlc krle krrb krrc krre krrk krrl krrr krrs krsc krse krsk krsl krsr krss krsu kruc krue kruk krul krur ksbc ksbl ksbr ksbs kscb ksce ksck kscl kscr kscs kscu ksec ksee ksek ksel kser kskb kske kskk kskr ksks ksku kslb kslc ksle kslk ksll kslr kslu ksrb ksrr ksrs ksse kssl kssr ksss kssu ksub ksue ksuu kubb kubc kube kubr kubs kubu kucb kucc kuce kucr kuek kuel kues kueu kuke kukk kukl kuks kuku kulb kule kull kulu kurb kure kurk kurl kurr kurs kuru kusb kusc kusu kuub kuuk kuul kuur kuuu lbcc lblr lbrs lbsc lcbc lccc lcce lccs lcer lces lcls lcrl lcrs lcsc lcsr le-u lebu lece leck leek leel leer lees leke lekk leks lele lell lelu lerc lere lerk lese lesk less lesu leuc leuk leur lkrs llbs llcc llcs lles lleu llks lllc llll lrcs lrrc lrrr lrse ls-r lsbu lscb lscs lses lsrc lssr lube lubs luce luck lucs luer lues luke lule lull lulu lure lurk lurs luse lusk luss luuk rbbb rbbr rbbs rbcl rble rbsl rbss rcbc rccb rccc rccs rcle rcls rcsc rcsl rcss rebb rebe rebk rebs rebu recc rece reck recr recs recu reeb reek reel rees reke reks relb rele rell rels rere rers reru rese ress reue reuk reul reus reuu rkss rlcs rlee rleu rlls rrle rrrr rscc rscs rsee rslc rsre rssl rubb rube rubs rubu ruce ruck ruel ruer rues ruke rukk ruku rule rulk rull rurc rure rurs ruru ruse rusk russ rusu sbbs sbcc sbcs sber sbrk sbse sbus sccc scce sccl sccs scec scee scel scer sck- sckl scl- sclc sclk scls scr- scrc scre scrs scsc scsl scsr scsu scub scul scur se-c se-e se-k se-s se-u sebe sebs sec- secc sece seck secr secs secu seeb seec seek seel seer sees seeu seke sekk seku selb sele selk sell sels selu serb serc sere serk serr sers seru sesc sese sess seul seur skee skel sker skes skss skue skul skur slcc slcu sleb slee sler sles slrc slre slrs slsc slsu slub sluc slue slur srbc srcc sreb srec sres srub ssbr sscc ssce sscs ssec ssee sses sslc ssle ssrc ssrl ssrs sssb sssc ssss sub- subb subl subs suc- succ suck sucr sucs suee suel suer sues sueu suke suks suku