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