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