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