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