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