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