bbbb bbbs bbeb bblb bbls bcbc bcbs bccc bccl bccs bcec bces bcsc bcsl bcss bebb bebe beck becs beeb beek beel bees beke beks bele belk bell bels bes- bese besk bess bleb blee blek bles blkb blls blss bscs bseb bsec bsee bses bslc bssc bsse cbbc cbbs cbcc cbce cbcl cbcs cbec cbee cbkl cblb cblc cbsc cbse ccbc cccb cccc cccl cccs ccee ccel cclc ccls ccsl ccss cebs cec- cece cecs ceeb ceec ceel cees ceke cel- celc cele cell cels cesc cese cess ckbc ckbe ckck ckcl ckcs cksb cksl clec clee clek cles clsc cscb cscc csce cscl cscs csec csee csks csse e-cl ebbc ebbs ebcc ebel ebes ecbc ecbe eccb eccc ecce eccl eces ecks ecsc ecse ecss eecs eeee eees eeke eeks eele eels eese eesk ekeb ekek ekes el-b elbe elcb elce elec elee elek eles elke elks elle ells else esbs escb esce escs esee esek esel eses eske esks esse essl kbbb kbbc kbbe kbbk kbbl kbbs kbcb kbce kbck kbcl kbcs kbeb kbec kbee kbek kbel kbes kbkb kbkk kbkl kblb kble kbll kbls kbsb kbsk kbss kcbc kcbk kcbl kcbs kccb kccc kcck kccl kceb kcec kcee kcel kckc kckk kckl kclc kcle kclk kcll kcls kcsb kcsc kcse kcss kebb kebc kebe keck keek keel kees kekb kekc keke kekl keks kele kelk kell kesb kesc kesk kess kkbb kkbe kkbl kkbs kkcb kkck kkcl kkcs kkkk kklb kklc kkll kkls kkse kkss klbb klbc klbe klbl klbs klcb klcc klce klck klcl klcs kleb klec klee klek kles klkc klkk klkl klks kllb kllc klle kllk klls klsc klse ksbc ksbl ksbs kscb ksce ksck kscl kscs ksec ksee ksek ksel kskb kske kskk ksks kslb kslc ksle kslk ksll ksse kssl ksss lbcc lbsc lcbc lccc lcce lccs lces lcls lcsc lece leck leek leel lees leke lekk leks lele lell lese lesk less llbs llcc llcs lles llks lllc llll lscb lscs lses sbbs sbcc sbcs sbse sccc scce sccl sccs scec scee scel sck- sckl scl- sclc sclk scls scsc scsl se-c se-e se-k se-s sebe sebs sec- secc sece seck secs seeb seec seek seel sees seke sekk selb sele selk sell sels sesc sese sess skee skel skes skss slcc sleb slee sles slsc sscc ssce sscs ssec ssee sses sslc ssle sssb sssc ssss