select distinct substring(name,1,1) from stamps ,color_master where color_master.color_code=stamps.color_code and color_master.color='Suede Gray' and year(stamps.issue_date)=1971 and stamps.serial_no='0642' order by substring(name,1,1)
IndianPost
Color >> Suede Gray >> Issue Date >> year >> 1971 >> Serial Number >> 0642 >> Alpha >> C >>