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