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