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