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