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