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