bbbb bbeb bblb bcbc bccc bccl bcec bebb bebe beck beeb beek beel beke bele belk bell bleb blee blek blkb cbbc cbcc cbce cbcl cbec cbee cbkl cblb cblc ccbc cccb cccc cccl ccee ccel cclc cec- cece ceeb ceec ceel ceke cel- celc cele cell ckbc ckbe ckck ckcl clec clee clek e-cl ebbc ebcc ebel ecbc ecbe eccb eccc ecce eccl eeee eeke eele ekeb ekek el-b elbe elcb elce elec elee elek elke elle kbbb kbbc kbbe kbbk kbbl kbcb kbce kbck kbcl kbeb kbec kbee kbek kbel kbkb kbkk kbkl kblb kble kbll kcbc kcbk kcbl kccb kccc kcck kccl kceb kcec kcee kcel kckc kckk kckl kclc kcle kclk kcll kebb kebc kebe keck keek keel kekb kekc keke kekl kele kelk kell kkbb kkbe kkbl kkcb kkck kkcl kkkk kklb kklc kkll klbb klbc klbe klbl klcb klcc klce klck klcl kleb klec klee klek klkc klkk klkl kllb kllc klle kllk lbcc lcbc lccc lcce lece leck leek leel leke lekk lele lell llcc lllc llll