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