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