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