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