select distinct substring(name,1,1) from stamps ,paper_master where paper_master.paper_code=stamps.paper_code and paper_master.paper='Unwatermarked Gummed coated paper' and stamps.serial_no='0686' order by substring(name,1,1)
IndianPost
Paper >> Unwatermarked Gummed coated paper >> Serial Number >> 0686 >> Alpha >> T >>