bbbb bbbs bbdd bcbc bcbp bcbs bccc bccs bcds bcpp bcps bcsc bcss bdbc bddc bdpc bdsd bpcp bsbd bscp bscs bspp bssc bssd c-cd cbbc cbbs cbcc cbcp cbcs cbdb cbdc cbds cbpc cbpp cbsc ccbc cccb cccc cccp cccs ccdc ccdp ccds ccpp ccps ccsd ccsp ccss cdcs cddb cdps cdss cpbc cpcs cppd cpps cpsc cscb cscc cscd cscs csdb csdp cspb cspc cspd csps cssd dbcc dbcp dbcs dbpc dbpd dbss dcbc dccb dccc dccp dccs dcdb dcds dcps dcsc dcss dddd ddps ddss dpbc dpcp dppc dpsd dsbc dscc dscp dscs dsdp dsps dssc dssp pbcc pbsp pcbc pcbs pccc pccs pcpb pcpp pcps pdbs pdcp pdsd pdss ppcc ppcd ppcs ppds pppd pppp ppps ppss psbd psdc psdp psds pspp psps pssc sbbs sbcc sbcs sbds sbsd sbsp sccc sccp sccs scdc scdp scds scpb scps scsc scsd sdcc sddc sdds sdps sdsc sdss spcc spcs spdc spdp sppd spps spsd spsp spss sscc sscp sscs ssdc ssdd ssdp sspc ssps sssb sssc ssss