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