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