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