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