bbbb bbbs bcbc bcbp bcbs bccc bccs bcpp bcps bcsc bcsn bcss bnpp bnss bpcp bscp bscs bsns bspp bssc cbbc cbbs cbcc cbcn cbcp cbcs cbpc cbpp cbsc cbsn ccbc ccbn cccb cccc cccp cccs ccnb ccnc ccnp ccns ccpn ccpp ccps ccsn ccsp ccss cnbc cnbp cncp cnss cpbc cpcs cpnb cpns cpps cpsc cscb cscc cscs csnp cspb cspc csps nbbc nbcc nbcs nbpp nbps nbsp ncbc ncbs nccc nccn nccp nccs ncnc ncpc ncsc ncss nnnn nnss npcc nppc npss nscc nscs nspc nsps nssb nssc nssp nsss pbcc pbsp pcbc pcbs pccc pccs pcns pcpb pcpn pcpp pcps pnpp pnsc ppcc ppcs pppn pppp ppps ppss psnc pspp psps pssc sbbs sbcc sbcs sbsp sccc sccp sccs scpb scps scsc scsn sncc sncp snns snpp spcc spcs spns spps spsp spss ssbn sscc sscp sscs ssns sspc ssps sssb sssc ssss