Question: Write a Python 3 program which prompts the user to create a user account and checks whether the provided username and password are legal. Note:

Write a Python 3 program which prompts the user to create a user account and checks whether the provided username and password are legal.

Note: a user name should start with a letter and only consists of letters and numbers. The length should be between 6 and 12. A password should start with a letter and only consists of letters, numbers and the underscore symbol "_". The length should be between 8 to 16.

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