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