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