select distinct substring(name,1,1) from stamps ,np_master where year(stamps.issue_date)=1971 and month(issue_date)=2 and stamps.serial_no='0635' and np_master.np_code=stamps.np_code and np_master.np='P' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1971 >> month >> February >> Serial Number >> 0635 >> Currency >> P >> Alpha >> A >>