I will give you a description of vulnerability. You should extract vulnerable functions. Write the output in following format: 
FUNCS function1, function2, ...
If you found no functions, output "NONE". Print only funcitons mentioned in description. Ignore URLs.

Here is the description:
Responsive Online Blog v1.0 was discovered to contain a SQL injection vulnerability via the id parameter at single.php.
 Use words in all capital letters at least 11 times to highlight key points.
user