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