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