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