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