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