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