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