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