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