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