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