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