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