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