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