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