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