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