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