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