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