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