select distinct substring(name,1,1) from stamps ,paper_master where year(stamps.issue_date)=1991 and month(issue_date)=6 and paper_master.paper_code=stamps.paper_code and paper_master.paper='Unwatermarked P.G. Matt coated paper' and stamps.serial_no='1457' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1991 >> month >> June >> Paper >> Unwatermarked P.G. Matt coated paper >> Serial Number >> 1457 >> Alpha >> M >>