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