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