bbbb bbbs bbeb bcbc bcbs bccc bccs bcec bces bcsc bcss bcuc bebb bebe beck becs becu beeb beek bees beke beks bes- bese besk bess beuk bscs bseb bsec bsee bses bssc bsse bubb bube bubs bubu bucc buce buck bucs bucu bueu buke bukk buku busc buse busk buss busu buus cbbc cbbs cbcc cbce cbcs cbcu cbec cbee cbsc cbse cbus ccbc cccb cccc cccs cccu ccee ccss ccuc ccus cebs cebu cec- cece cecs ceeb ceec cees ceke cesc cese cess ckbc ckbe ckck ckcs cksb cscb cscc csce cscs csec csee csks csse csus cub- cubb cube cubs cucc cuce cuck cuek cues cuk- cuke cusb cusk cuss cusu ebbc ebbs ebcc ebes ebus ecbc ecbe eccb eccc ecce eces ecks ecsc ecse ecss ecsu ecus eecs eeee eees eeke eeks eese eesk ekeb ekek ekes esbs escb esce escs escu esee esek eses eske esks esku esse essu esus eubc euse kbbb kbbc kbbe kbbk kbbs kbbu kbcb kbce kbck kbcs kbcu kbeb kbec kbee kbek kbes kbkb kbkk kbsb kbsk kbss kbsu kbub kbuc kbue kbuk kbus kbuu kcbc kcbk kcbs kcbu kccb kccc kcck kccu kceb kcec kcee kceu kckc kckk kcsb kcsc kcse kcss kcsu kcub kcue kcuk kebb kebc kebe kebu keck keek kees kekb kekc keke keks keku kesb kesc kesk kess keus kkbb kkbe kkbs kkcb kkck kkcs kkkk kkse kkss kksu kkus kkuu ksbc ksbs kscb ksce ksck kscs kscu ksec ksee ksek kskb kske kskk ksks ksku ksse ksss kssu ksub ksue ksuu kubb kubc kube kubs kubu kucb kucc kuce kuek kues kueu kuke kukk kuks kuku kusb kusc kusu kuub kuuk kuuu sbbs sbcc sbcs sbse sbus sccc scce sccs scec scee sck- scsc scsu scub se-c se-e se-k se-s se-u sebe sebs sec- secc sece seck secs secu seeb seec seek sees seeu seke sekk seku sesc sese sess skee skes skss skue sscc ssce sscs ssec ssee sses sssb sssc ssss sub- subb subs suc- succ suck sucs suee sues sueu suke suks suku sus- suse susk suss susu suus ubbe ubek ucbc uces ucsb ucsc ucsu uess ukcc ukek ukes ukeu uksc us-k usbc usbe usbs uscc usce uscs usee uses uske ussb ussc usse usss ussu usus uuuu