you are done.
Tips for a strong password
Your password should be easy for you to remember but hard for others to guess.
Never share your password with anyone, and never reuse a password that you've used before.
Your password must be at least eight characters long.
Use a combination of capital and lowercase letters, numbers, and special characters (such as @, ?, and %) in your password. (Yahoo! passwords are case-sensitive.)
Visit the Yahoo! Security Center for more information on password security, then sign into your Yahoo! account again.