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