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