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