select distinct substring(name,1,1) from stamps ,np_master where  np_master.np_code=stamps.np_code and np_master.np='N'  and year(stamps.issue_date)=A  order by substring(name,1,1)select distinct substring(name,1,1) from stamps ,np_master where  np_master.np_code=stamps.np_code and np_master.np='N'  and year(stamps.issue_date)=A  order by substring(name,1,1)