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