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