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