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