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