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