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