select distinct substring(name,1,1) from stamps ,paper_master,np_master where paper_master.paper_code=stamps.paper_code and paper_master.paper='Unwatermarked paper' and np_master.np_code=stamps.np_code and np_master.np='R' and year(stamps.issue_date)=1977 order by substring(name,1,1)
IndianPost
Paper >> Unwatermarked paper >> Currency >> R >> Issue Date >> year >> 1977 >> Alpha >> D >>