title: Write a function that can be invoked as ('say')('hi')()
body: <p>Write a function that can be invoked as a function that returns a function until no arguments are present, then it returns a string.</p>
  
  <pre><code>console.log(say('my')('name')('is')('bob')()); =&gt; 'my name is bob.'
  console.log(say('hello')('world')()); =&gt; 'hello world.'
  </code></pre>