A bank requires their customers to provide the last 8 digits of their bank card number as the User ID (or username) to access their online banking accounts. They also need to create a password with a length between 8 and 12 ASCII characters, which must meet the following restrictions:
- The password must have at least 8 characters.
- The password must have at least 1 letter.
- The password must have at least 1 number.
- The password must include both upper and lower case characters.
Additionally, the password must not:
- Contain only one character (e.g., 11111111 or aaaaaaaa).
- Contain only consecutive characters (e.g., 12345678 or abcdefgh).
Assume that by conducting the attack using an average modern GPU 15.6×10¹⁰ passwords can be tested per second, calculate the probability that a hacker can guess a password in the timeframe between two consecutive changes.