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