bbbb bbbs bbeb bcbc bcbs bccc bccs bcec bces bcsc bcss bebb bebe beck becs beeb beek bees beke beks bes- bese besk bess bscs bseb bsec bsee bses bssc bsse cbbc cbbs cbcc cbce cbcs cbec cbee cbsc cbse ccbc cccb cccc cccs ccee ccss cebs cec- cece cecs ceeb ceec cees ceke cesc cese cess ckbc ckbe ckck ckcs cksb cscb cscc csce cscs csec csee csks csse ebbc ebbs ebcc ebes ecbc ecbe eccb eccc ecce eces ecks ecsc ecse ecss eecs eeee eees eeke eeks eese eesk ekeb ekek ekes esbs escb esce escs esee esek eses eske esks esse kbbb kbbc kbbe kbbk kbbs kbcb kbce kbck kbcs kbeb kbec kbee kbek kbes kbkb kbkk kbsb kbsk kbss kcbc kcbk kcbs kccb kccc kcck kceb kcec kcee kckc kckk kcsb kcsc kcse kcss kebb kebc kebe keck keek kees kekb kekc keke keks kesb kesc kesk kess kkbb kkbe kkbs kkcb kkck kkcs kkkk kkse kkss ksbc ksbs kscb ksce ksck kscs ksec ksee ksek kskb kske kskk ksks ksse ksss sbbs sbcc sbcs sbse sccc scce sccs scec scee sck- scsc se-c se-e se-k se-s sebe sebs sec- secc sece seck secs seeb seec seek sees seke sekk sesc sese sess skee skes skss sscc ssce sscs ssec ssee sses sssb sssc ssss