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