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