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