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