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