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