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