bbbb bbci bbeb bblb bcbc bccc bcci bccl bcec bcie bcuc bebb bebe bebi beci becu beeb beel beic beil bele beli bell belu bibb bibe bibi bibl bicc bice bici bieb biel bieu bile bili bill bilu blcu bleb blee blei bleu blic blub blue bubb bube bubi bubu bucc buce buci bucu buel bueu buic buie buiu bulb bule buli bull bulu cbbc cbcc cbce cbcl cbcu cbec cbee cblb cblc ccbc cccb cccc ccci cccl cccu ccee ccel ccic ccii ccil cclc ccli ccuc cebu cec- cece ceci ceeb ceec ceel ceil cel- celc cele celi cell ceui cibc cibe cibi cicc cici cicu ciee ciel ciii cili cill ciuc clec clee clei cleu clib clic clii club clue cub- cubb cube cubi cucc cuce cuci cui- cuil culb culc cule cull e-cl ebbc ebcc ebel ebic ebli ebul ecbc ecbe eccb eccc ecce ecci eccl ecib ecil eeee eele eiec eiei eile el-b elbe elbi elbu elcb elce elec elee elic elie elil elle elli ellu elue elui elul eubc eubi eule i-be ibec ibie ible icbc iccb iccc icci iccl iccu icec icee icel icle icll icub icue iecc ieie iele iiie iiii iiuc ilbc ilce ile- ilec ilic ilie ill- ille illi iucc iuce iuel iuiu lbcc lcbc lccc lcce le-u lebu lece leel leib leic leie leil lele leli lell lelu leuc libc libe libu lice lieb liel lieu liii lilb lile lili lill lilu liue llcc lleu lllc llll lube luce luci lule luli lull lulu u-ie ubbe ubbi ubic ubii uble ubli ucbc ucci ucel ucil uele ueli uell uile ulbc ulcc uleb ulee ulic ulie ulle ulli ulul uulu uuuu