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