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