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