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