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