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