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