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