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