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<html>
<h2>Aggregation - Sum</h2>
<p>
    In this task, we are going to compute the sum of all elements from an input.</p>
<br>
<br>
<div class='hint'>Use <a href="https://beam.apache.org/releases/pydoc/2.11.0/apache_beam.transforms.core.html#apache_beam.transforms.core.CombineGlobally">CombineGlobally</a>
    and Python built-in <a href="https://docs.python.org/2/library/functions.html#sum">sum</a></div>
</html>