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