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