select distinct substring(name,1,1) from stamps ,paper_master where year(stamps.issue_date)=1987 and month(issue_date)=8 and paper_master.paper_code=stamps.paper_code and paper_master.paper='Unwatermarked P.G. Matt coated paper' and stamps.serial_no='1235' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1987 >> month >> August >> Paper >> Unwatermarked P.G. Matt coated paper >> Serial Number >> 1235 >> Alpha >> S >>