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