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