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