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