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