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