bbbb bbeb bblb bbrc bcbc bccc bccl bcec bcer bebb bebe beeb beel beer bele bell berc bere berr bleb blee blrc brcb brce breb brec bree brel brer brex brrr cbbc cbcc cbce cbcl cbcr cbec cbee cber cblb cblc cbre cbrl ccbc cccb cccc cccl ccee ccel cclc cclx ccrc ccre ccrl ccxl cec- cece ceeb ceec ceel cel- celc cele cell cer- cerc cere cerl cexe clec clee cler clxx crbc crcc crce crcr cre- creb crec cree crex cxxx e-cl ebbc ebbr ebcc ebel eber ecbc ecbe eccb eccc ecce eccl ecrc ecrl ecrr eeee eele eerc el-b elbe elcb elce elec elee eler elex elle er-x erbb erbe ercc erce ereb erec erel erer erle erll errc erre excl exec exel exer exrx lbcc lblr lcbc lccc lcce lcer lcrl lece leel leer lele lell lerc lere lexx llcc lllc llll lrrc lrrr lxxx rbbb rbbr rbcl rble rcbc rccb rccc rcle rebb rebe recc rece recr reeb reel relb rele rell rere rexx rlee rrle rrrr xbee xbel xbrl xcbl xcel xeer xer- xexe xxxx