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