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