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