X853: Jeroo multiple hops

You wrote the following statements when first learning about Jeroo methods--they move the Jeroo forward 3 steps. Now that you've found out there is a second version of the hop() method that takes an integer as a parameter, you want to revise these statements to use just one method call. Change the code to use just one call to hop() by passing the distance to move as a parameter inside the parentheses.

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