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