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