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