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