bbbb bbeb bblb bbrc bcbc bccc bccl bcec bcer bebb bebe beck beeb beek beel beer beke bele belk bell berc bere berk berr bleb blee blek blkb blrc brcb brce breb brec bree brek brel brer brkb brrr cbbc cbcc cbce cbcl cbcr cbec cbee cber cbkl cbkr cblb cblc cbre cbrl ccbc cccb cccc cccl ccee ccel cclc ccrc ccre ccrl cec- cece ceeb ceec ceel ceke cel- celc cele cell cer- cerc cere cerl ckbc ckbe ckck ckcl cker ckrc clec clee clek cler crbc crcc crce crcr cre- creb crec cree crkc crkl e-cl ebbc ebbr ebcc ebel eber ecbc ecbe eccb eccc ecce eccl ecrc ecrl ecrr eeee eeke eele eerc ekeb ekek eker el-b elbe elcb elce elec elee elek eler elke elle erbb erbe ercc erce ereb erec erel erer erke erle erll errc erre kbbb kbbc kbbe kbbk kbbl kbbr kbcb kbce kbck kbcl kbcr kbeb kbec kbee kbek kbel kber kbkb kbkk kbkl kbkr kblb kble kbll kblr kbrb kbrc kbre kbrk kbrl kcbc kcbk kcbl kcbr kccb kccc kcck kccl kccr kceb kcec kcee kcel kckc kckk kckl kckr kclc kcle kclk kcll kclr kcrc kcrr kebb kebc kebe kebr keck kecr keek keel keer kekb kekc keke kekl kele kelk kell ker- kerb kerc kere kerk kerl kerr kkbb kkbe kkbl kkbr kkcb kkck kkcl kkcr kkkk kklb kklc kkll kkrb kkrc kkre kkrk kkrl kkrr klbb klbc klbe klbl klcb klcc klce klck klcl klcr kleb klec klee klek kler klkc klkk klkl klkr kllb kllc klle kllk klrc klrk klrr krbb krbe krbk krbl krbr krcb krcc krce krcl kreb krec kree krek krkc krke krkk krkr krlc krle krrb krrc krre krrk krrl krrr lbcc lblr lcbc lccc lcce lcer lcrl lece leck leek leel leer leke lekk lele lell lerc lere lerk llcc lllc llll lrrc lrrr rbbb rbbr rbcl rble rcbc rccb rccc rcle rebb rebe rebk recc rece reck recr reeb reek reel reke relb rele rell rere rlee rrle rrrr