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