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