select distinct substring(name,1,1) from stamps ,color_master,np_master where color_master.color_code=stamps.color_code and color_master.color='Green and Golden brown (Superimposed)' and year(stamps.issue_date)=1973 and np_master.np_code=stamps.np_code and np_master.np='P' order by substring(name,1,1)
StampsIndia
Color >> Green and Golden brown (Superimposed) >> Issue Date >> year >> 1973 >> Currency >> P >> Alpha >> D >>