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