select distinct substring(name,1,1) from stamps ,color_master where color_master.color_code=stamps.color_code and color_master.color='Reddish Purple' and stamps.serial_no='0560' and year(stamps.issue_date)=1968 order by substring(name,1,1)
IndianPost
Color >> Reddish Purple >> Serial Number >> 0560 >> Issue Date >> year >> 1968 >> Alpha >> C >>