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