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