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