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