Escape to Earth!

You wake up with a throbbing headache. As you look around, you realize you're not on Earth anymore. 

How do you know this? Well, you can see it up in the sky! You must have been kidnapped and transported to a distant planet. 
At your feet, there is a map of the planet and a large box with four digital inputs. 

When you shake the box, it says, "Open me with four codes for a trip back to earth." 

Suddenly, the box beeps and the timer begins. Good luck! 

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