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