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