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