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