bbbb bbci bbeb bblb bbrc bcbc bccc bcci bccl bcec bcer bcie bcru bcuc bebb bebe bebi beci becu beeb beel beer beic beil beir bele beli bell belu berc bere beri berr beru beur bibb bibe bibi bibl bicc bice bici bieb biel bier bieu bile bili bill bilu birb bire biri birl birr biru blcu bleb blee blei bleu blic blir blrc blub blue blur brcb brce breb brec bree brei brel brer bric brie bril brrr bruc brue bubb bube bubi bubu bucc buce buci bucu buel buer bueu buic buie buir buiu bulb bule buli bull bulu bur- burb bure buri burl burr buru cbbc cbcc cbce cbcl cbcr cbcu cbec cbee cber cbir cblb cblc cbre cbrl ccbc cccb cccc ccci cccl cccu ccee ccel ccic ccii ccil ccir cclc ccli ccrc ccre ccri ccrl ccuc cebu cec- cece ceci ceeb ceec ceel ceil cel- celc cele celi cell cer- cerc cere ceri cerl ceui cibc cibe cibi cicc cici cicr cicu ciee ciel cier ciii cili cill cirb circ cire ciri cirl cirr ciuc clec clee clei cler cleu clib clic clii clir clri club clue crbc crbu crcc crce crcr cre- creb crec cree crei creu crib cric crie criu crub crue cub- cubb cube cubi cucc cuce cuci cuer cui- cuil cuir culb culc cule cull curb cure curi curl curr e-cl ebbc ebbr ebcc ebel eber ebic ebli ebru ebul ebur ecbc ecbe eccb eccc ecce ecci eccl ecib ecil ecrc ecri ecrl ecrr ecru eeee eele eerc eiec eiei eier eile eire el-b elbe elbi elbu elcb elce elec elee eler elic elie elil elle elli ellu elue elui elul erbb erbe ercc erce ereb erec erei erel erer eric erie eril eriu erle erli erll errc erre erub eruc erur eubc eubi euer eule eur- eurc eure i-be ibec ibie ible ibrc ibri icbc iccb iccc icci iccl iccr iccu icec icee icel icer icle icll iclr icrc icre icrr icru icub icue iecc ieie iele iere ieri iiie iiii iirc iiuc ilbc ilce ile- ilec iler ilic ilie ilir ill- ille illi ilre irbe ircc ircu iree irel irer iri- iric irie iril irlb irrc irre irri irul iucc iuce iuel iuiu lbcc lblr lcbc lccc lcce lcer lcrl le-u lebu lece leel leer leib leic leie leil leir lele leli lell lelu lerc lere leuc leur libc libe libr libu lice licr lieb liel lier lieu liii liir lilb lile lili lill lilu lirc lire liri lirl lirr liru liue llcc lleu lllc llll lric lrrc lrrr lube luce luci luer lule luli lull lulu lure luri rbbb rbbr rbcl rble rcbc rccb rccc rcic rcle rebb rebe rebu recc rece reci recr recu reeb reel reii reil reir reiu relb rele rell rere reri reru reue reul reuu rib- ribe ribu ricc rice riel rier rieu rile rill rilu rire riri riue rlee rleu rrle rrrr rubb rube rubi rubu ruce ruci ruel ruer rule rull rurc rure ruri ruru u-ie ubbe ubbi uber ubic ubii ubir uble ubli ucbc ucci ucel ucil ucrc ueir uele ueli uell uile uirr ulbc ulcc uleb ulee ulic ulie ulle ulli ullr ulul urbe urbi urci ure- urib uric urie uriu urle urre urri urur uulu uuri uuuu