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