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