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