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