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