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