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