select distinct substring(name,1,1) from stamps ,printsize_master where year(stamps.issue_date)=1978 and month(issue_date)=9 and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='3.91x2.90' and stamps.serial_no='0897' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1978 >> month >> September >> Print Size >> 3.91x2.90 >> Serial Number >> 0897 >> Alpha >> U >>