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