select distinct substring(name,1,1) from stamps ,printsize_master where year(stamps.issue_date)=1981 and month(issue_date)=2 and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='4.06 x 2.4' and stamps.serial_no='0998' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1981 >> month >> February >> Print Size >> 4.06 x 2.4 >> Serial Number >> 0998 >> Alpha >> S >>