Browser Back Button

Where does the back button actually take you? Wherever the history pile says. 🌐

You start on home. You get commands — visit:site goes to a new page, back returns to the previous one (never past home). Print the page you end on.

Example:

Input: commands = ["visit:zoo", "visit:games", "back"] Output: zoo

The history pile grows to [home, zoo, games]. back pops games off the top, leaving zoo as where you end up.