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