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