select distinct substring(name,1,1) from stamps ,printsize_master where year(stamps.issue_date)=1974 and month(issue_date)=8 and stamps.serial_no='0720' and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='3.56 x 2.5' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1974 >> month >> August >> Serial Number >> 0720 >> Print Size >> 3.56 x 2.5 >> Alpha >> W >>