Write a program that uses a function to check whether a string is a valid password. The password rule is as follows:
• A password must have at least eight characters.
• A password consists of only letters and digits.
• A password must contain at least two digits.
Write a program that prompts the user to enter a password and displays "valid password"
if the rule is followed or "invalid password" otherwise.
Sample 1
Enter a string for password: wewew43x
valid password
Sample 2
Enter a string for password: 343a
invalid password