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