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