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