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