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