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