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