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