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