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