bbbb bbbs bbdd bbfc bcbc bcbs bccc bccs bcds bcfc bcsc bcss bdbc bddc bdsd bfcs bffs bsbd bscs bsfc bsff bsfs bssc bssd c-cd cbbc cbbs cbcc cbcs cbdb cbdc cbds cbfb cbfc cbsc ccbc cccb cccc cccf cccs ccdc ccdf ccds ccfc ccfd ccff ccsd ccsf ccss cdbf cdcs cddb cdfs cdss cfbc cfbs cfcb cfcf cfcs cfds cffb csbf cscb cscc cscd cscf cscs csdb csfc cssd dbcc dbcs dbfc dbfs dbss dcbc dccb dccc dccs dcdb dcds dcfc dcfs dcsc dcss dddd ddss dfcc dfcs dfds dsbc dscc dscs dsfc dssc fbsd fcbs fccf fcds fcsc ffcc ffff ffss fscb fscc fssc fssf sbbs sbcc sbcs sbds sbfc sbsd sccc sccs scdc scdf scds scfc scsc scsd sdcc sddc sdds sdfc sdsc sdsf sdss sfbc sfcc sfcs sfdc sffc sfss sscc sscs ssdc ssdd ssdf ssfc sssb sssc sssf ssss