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