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