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