Did you notice?
The map is divided into a grid and the arrows represent the vertical and horizontal axis?
The letter number pairs for each item in the vending machine?
The first house is located at the ( A , 1 ) position on the grid, the second house is at the ( B, 3 ) position on the grid?
The color of the A1 item in the vending machine is orange and the color of the B3 item is red?
ANSWER: ORANGE - RED - GREEN - RED