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