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