select distinct substring(name,1,1) from stamps ,color_master,np_master where np_master.np_code=stamps.np_code and np_master.np='R' and color_master.color_code=stamps.color_code and color_master.color='Yellow Green and Blue Black' and year(stamps.issue_date)=1977 order by substring(name,1,1)
IndianPost
Currency >> R >> Color >> Yellow Green and Blue Black >> Issue Date >> year >> 1977 >> Alpha >> B >>