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