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