>str</code>, which uses <code>Song</code>'s <code>__str__</code> method. Notice that for the string representation of <code>seconds</code>, we perform <code>rjust</code>. Here is
        an example of how we'll use it:
    </p>
    <pre>
>>> '3'.rjust(2,'0')
'03'
>>> '14'.rjust(2, '0')
'14'
    </pre>
    <p>
        Essentially, <code>rjust</code> makes sure that the string has exactly two characters. If it doesn't, then <code>rjust</code>
        will add as many <code>0</code>s as necessary to