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