select distinct substring(name,1,1) from stamps ,paper_master where year(stamps.issue_date)=1988 and month(issue_date)=5 and dayofmonth(stamps.issue_date)=31 and paper_master.paper_code=stamps.paper_code and paper_master.paper='Unwatermarked P.G. Matt coated paper' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1988 >> month >> May >> day >> 31 >> Paper >> Unwatermarked P.G. Matt coated paper >> Alpha >> L >>