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