Your goal is to find the secret four-color code. The following colors are possible: green, blue, purple, brown, red, white.
Some guesses have already been made. I will provide feedback for each guess made with which it is possible to unambigiously determine the secret code.

Previous Guesses:
Guess: ['blue', 'white', 'red', 'purple']. Hint: two colors are in the secret code but in the wrong positions.
Guess: ['green', 'green', 'blue', 'white']. Hint: two colors are in the correct positions.
Guess: ['green', 'brown', 'blue', 'red']. Hint: one color is in the correct position and three colors are in the secret code but in the wrong position.
A B C D
red, green, blue, brown red, red, purple, green white, white, brown, blue red, purple, red, brown