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: ['blue', 'black', 'white', 'red']. Hint: two colors are in the correct positions and two colors are in the secret code but in the wrong positions.
Guess: ['white', 'white', 'red', 'red']. Hint: two colors are in the correct positions.
Guess: ['white', 'black', 'blue', 'red']. 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, white, red brown, white, red, white blue, white, black, red green, green, brown, blue