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