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