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