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