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