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