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