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