Introduction

The residents who live on GoPiGo Drive in Colorado Springs are waiting for their mail to be delivered.

Colorado Springs got its name* because of the unusual addressing system that they’ve adopted. Instead of numbers, houses on every street are identified by colors (hence Colorado). This enables your courier service to use a fleet of color-aware robots to deliver packages. As one of these robot handlers, you are tasked with delivering a selection of cards to the residents of GoPiGo Drive, a small cul-de-sac containing 3 houses.

*This isn't actually true, but makes for a very fun story! Colorado Springs actually was named for the natural springs that were discovered in the late 1800's. And the real city uses a number-based system like yours.