-ene bbbb bbeb bblb bbrc bcbc bccc bccl bcec bcer bebb bebe beck beeb beek beel been beer beke bele belk bell bene benk benn berc bere berk bern berr bleb blee blek blkb blrc bner bnrr brcb brce breb brec bree brek brel bren brer brkb brrr cbbc cbcc cbce cbcl cbcn cbcr cbec cbee cber cbkl cbkn cbkr cblb cblc cbln cbre cbrl cbrn ccbc ccbn cccb cccc cccl ccee ccel cclc ccnb ccnc ccne ccnr ccrc ccre ccrl cec- cece ceeb ceec ceel ceke cel- celc cele cell cen- cene cer- cerc cere cerl cern ckbc ckbe ckck ckcl cken cker ckln cknb cknc ckrc clec clee clek cler cnbc cnbl cnel cnrc cnrr crbc crcc crce crcr cre- creb crec cree cren crkc crkl crne e-cl ebbc ebbr ebcc ebel eben eber ecbc ecbe eccb eccc ecce eccl ecne ecrc ecrl ecrr eeee eeke eele eerc ekeb ekek eken eker ekne el-b elbe elcb elce elec elee elek elen eler elke elle elne enb- enbn enbr ence encl enee enel ener enke enkr ennc enne erbb erbe ercc erce ereb erec erel eren erer erke erle erll erne errc erre kbbb kbbc kbbe kbbk kbbl kbbr kbcb kbce kbck kbcl kbcr kbeb kbec kbee kbek kbel kben kber kbkb kbkk kbkl kbkr kblb kble kbll kblr kbnl kbnn kbnr kbrb kbrc kbre kbrk kbrl kbrn kcbc kcbk kcbl kcbr kccb kccc kcck kccl kccr kceb kcec kcee kcel kckc kckk kckl kckn kckr kclc kcle kclk kcll kcln kclr kcnb kcnr kcrc kcrn kcrr kebb kebc kebe kebn kebr keck kecr keek keel keen keer kekb kekc keke kekl kele kelk kell keln ken- kene kenk kenl kenn kenr ker- kerb kerc kere kerk kerl kern kerr kkbb kkbe kkbl kkbn kkbr kkcb kkck kkcl kkcn kkcr kken kkkk kklb kklc kkll kkln kknb kkne kknn kkrb kkrc kkre kkrk kkrl kkrn kkrr klbb klbc klbe klbl klbn klcb klcc klce klck klcl klcn klcr kleb klec klee klek klen kler klkc klkk klkl klkn klkr kllb kllc klle kllk klnc klne klnn klrc klrk klrn klrr knbb knbc knbe knbn knbr kncb knce knck kncn kncr kneb knec knee knek knel knen knkk knlb knlc knlr knnb knnk knnr knrb knrk krbb krbe krbk krbl krbr krcb krcc krce krcl krcn kreb krec kree krek kren krkc krke krkk krkn krkr krlc krle krln krnb krne krnk krnn krrb krrc krre krrk krrl krrn krrr lbcc lblr lcbc lccc lcce lcer lcrl lece leck leek leel leen leer leke lekk lele lell lene lenk lenn lerc lere lerk lern llcc lllc llll lncr lner lnnk lrne lrrc lrrr nbbc nbcc nber ncbc nccc nccn nccr ncec ncee ncel ncen ncer nclc ncln nclr ncnc ncrc ncre nebb nebe nebn nebr necc nece neck necr neeb neel neen neer neke nelc nele nell nene nerc nere nerk nerl nerr nlcc nlec nler nlrb nnnn nren nrlb nrrc nrrl rbbb rbbr rbcl rble rcbc rccb rccc rcle rcnl rcnr rebb rebe rebk recc rece reck recr reeb reek reel reen reke relb rele rell rene renk renn rere rlee rnbr rrle rrrr