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