select distinct substring(name,1,1) from stamps ,printsize_master where year(stamps.issue_date)=1971 and month(issue_date)=4 and stamps.serial_no='0637' and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='2.987 x 2.' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1971 >> month >> April >> Serial Number >> 0637 >> Print Size >> 2.987 x 2. >> Alpha >> S >>