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