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