select distinct substring(name,1,1) from stamps ,paper_master,np_master where year(stamps.issue_date)=1984 and month(issue_date)=4 and np_master.np_code=stamps.np_code and np_master.np='R' and paper_master.paper_code=stamps.paper_code and paper_master.paper='Unwatermarked Imported Gummed coated paper' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1984 >> month >> April >> Currency >> R >> Paper >> Unwatermarked Imported Gummed coated paper >> Alpha >> S >>