Functions don't have to be the same every time. We can pass them different `parameters` which can change their behavior. The `say` function below takes parameters we've named `words` and then tells Tina to say those words. <iframe src="https://trinket.io/embed/blocks/0c60a78839" width="100%" height="600" frameborder="0" marginwidth="0" marginheight="0" allowfullscreen></iframe> Try these: * Change the parameters of the functins to change what Tina says. * `call` the function again to make Tina say more things * Change what Tina does in the function * **Advanced**: Make Tina yell by making the words UPPERCASE

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