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