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