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