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