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