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