You are creating a new account and need to provide a password. The password has the following requirements: a. The password must be at least 6 characters and at most 20 characters.
b. It must contain at least one lowercase letter, one uppercase letter, and one number.

Required:
Write a program that prompts the user to input a password and checks if the password is valid. If the password is valid, print a confirmation statement. If it is not, print a statement that the password is not valid.