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