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