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