select distinct substring(name,1,1) from stamps ,np_master where year(stamps.issue_date)=1959 and stamps.serial_no='0423' and np_master.np_code=stamps.np_code and np_master.np='P' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1959 >> Serial Number >> 0423 >> Currency >> P >> Alpha >> T >>