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