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