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