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