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