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