Your goal is to find the secret four-color code. The following colors are possible: purple, brown, red, green, white, yellow.
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: ['brown', 'red', 'yellow', 'purple']. Hint: two colors are in the secret code but in the wrong positions.
Guess: ['purple', 'green', 'red', 'green']. Hint: two colors are in the correct positions and one color is in the secret code but in the wrong positions.
Guess: ['purple', 'green', 'yellow', 'white']. Hint: three colors are in the secret code but in the wrong positions.
A B C D
green, purple, white, brown green, purple, brown, white brown, red, white, green white, purple, red, green