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