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