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