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