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