select distinct substring(name,1,1) from stamps ,printsize_master,np_master where year(stamps.issue_date)=1966 and month(issue_date)=4 and np_master.np_code=stamps.np_code and np_master.np='P' and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize='3.88 x 2 c' order by substring(name,1,1)
IndianPost
Issue Date >> year >> 1966 >> month >> April >> Currency >> P >> Print Size >> 3.88 x 2 c >> Alpha >> K >>