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