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