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