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