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