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