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