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