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