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