select distinct substring(name,1,1) from stamps ,printsize_master where year(stamps.issue_date)=1969 and month(issue_date)=5 and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='3.80 X 2.0' and stamps.serial_no='0591' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1969 >> month >> May >> Print Size >> 3.80 X 2.0 >> Serial Number >> 0591 >> Alpha >> A >>