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