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