You hear a knock on the door downstairs while you're sleeping. You creep down the stairs by the light of your phone, only to see a shadow exiting through the window. By the moonlight, you see a piece of paper flutter down to the ground. On it, is written: "If you can decrypt this by midnight tomorrow, perchance you may live."
The following series of numbers and dashes is written:
Desperate to save your life, you get to work. What is the solution you come up with?