select distinct substring(name,1,1) from stamps ,paper_master where year(stamps.issue_date)=1980 and month(issue_date)=4 and paper_master.paper_code=stamps.paper_code and paper_master.paper='Watermarked paper' and stamps.serial_no='0966' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1980 >> month >> April >> Paper >> Watermarked paper >> Serial Number >> 0966 >> Alpha >> C >>