select distinct substring(name,1,1) from stamps ,color_master where color_master.color_code=stamps.color_code and color_master.color='Brown and Green' and year(stamps.issue_date)=1972 and stamps.serial_no='0670' order by substring(name,1,1)
IndianPost
Color >> Brown and Green >> Issue Date >> year >> 1972 >> Serial Number >> 0670 >> Alpha >> D >>