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