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