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