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