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