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