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