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