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