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