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