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