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