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