Changes

:* <code>A description of how your main program works. The main program flow is provided to you in a1_template.py. Open the file, and use clear English to describe what each line of code does in such a way that a competent Python coder could reproduce the code without seeing it firsthand.</code> :* <code>You will then apply the same principles to create an algorithm for each validation function named in the a1_template.py file. Inside the code, if you are calling another function like "leap_year()", you may simply describe what the function will return, and not the operation of the function itself. </code>