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