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