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