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