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