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