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