bbbb bbeb bblb bbrc bcbc bccc bccl bcec bcer bcru bcuc bebb bebe becu beeb beel beer bele bell belu berc bere berr beru beur blcu bleb blee bleu blrc blub blue blur brcb brce breb brec bree brel brer brev brrr bruc brue bruv bubb bube bubu bucc buce bucu buel buer bueu bulb bule bull bulu bur- burb bure burl burr buru buve cbbc cbcc cbce cbcl cbcr cbcu cbec cbee cber cblb cblc cbre cbrl cbvb cbve cbvr ccbc cccb cccc cccl cccu cccv ccee ccel cclc cclv ccrc ccre ccrl ccuc cebu cec- cece ceeb ceec ceel cel- celc cele cell cer- cerc cere cerl clec clee cler cleu clrv club clue crbc crbu crcc crce crcr cre- creb crec cree creu crub crue cub- cubb cube cucc cuce cuer culb culc cule cull curb cure curl curr cuve cvcc cver cvrr e-cl ebbc ebbr ebcc ebel eber ebru ebul ebur ecbc ecbe eccb eccc ecce eccl ecrc ecrl ecrr ecru ecrv eeee eele eelv eerc el-b elbe elbu elcb elce elec elee eler elev elle ellu elue elul elve erbb erbe ercc erce ereb erec erel erer erev erle erll errc erre erub eruc erur eruv erve eubc euer eule eur- eurc eure evel ever evre lbcc lblr lcbc lccc lcce lcer lcrl lcrv le-u lebu lece leel leer lele lell lelu lerc lere leuc leur lev- levc leve llcc lleu lllc llll lrrc lrrr lube luce luer lule lull lulu lure lurv luve lvcc lvrr rbbb rbbr rbcl rble rcbc rccb rccc rcle rcuv rcvr rebb rebe rebu recc rece recr recu reeb reel reev relb rele rell rere reru reue reul reuu reve rlee rleu rrle rrrr rubb rube rubu ruce ruel ruer rule rull rurc rure ruru ruve ruvu rv-c rver ubbe uber uble ucbc ucel ucrc uele uell ulbc ulcc uleb ulee ulle ullr ulul urbe ure- urle urre urur urve uulu uuuu uv-b uv-c uvel uver uvvu vbcc vecc veel veer vel- vele vell velu ver- verb vere verl veur veve vlcc vrbl vuel vull vurb vver vvvv