What test case should I include in order to test the following functions?
<p>What test case should I include in order to test the following functions?</p>

<pre><code>    example: most_A([['A','A','B','B'],['A','B','B','B'],['A','A','B','A']])
    result should be: ([3,2,0,1])
    '''
</code></pre>
