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