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