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