Your goal is to find the secret four-color code. The following colors are possible: black, brown, purple, blue, yellow, 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: ['black', 'brown', 'black', 'yellow']. Hint: one color is in the correct position.
Guess: ['black', 'purple', 'blue', 'purple']. Hint: three colors are in the correct positions.
Guess: ['black', 'purple', 'white', 'purple']. 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, yellow, yellow black, purple, black, white black, white, blue, purple yellow, blue, yellow, yellow