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