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