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