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