For your security, we require a strong password. It must be 8-16 characters and include characters from at least three of ...

For your security, we require a strong password. 
It must be 8-16 characters and include characters from at least three of these four categories:
- Uppercase letters
- Lowercase letters
- Numbers
- Symbols:! @ # $ % ^ & * - _ + = [ ] | \ : ' , . ? / ` ~ "( ) ;
And please don't include your user name or user ID.