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