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