select distinct substring(name,1,1) from stamps ,paper_master where year(stamps.issue_date)=1979 and month(issue_date)=7 and paper_master.paper_code=stamps.paper_code and paper_master.paper='Unwatermarked adhesive stamp paper' and stamps.serial_no='0915' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1979 >> month >> July >> Paper >> Unwatermarked adhesive stamp paper >> Serial Number >> 0915 >> Alpha >> P >>