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