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