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